Útgefið efni

Ritrýnt efni:

2024

Söderroos, D., Stefánsdóttir, G. J., Gunnarsson, V., Rhodin, M., Ragnarsson, S., and Jansson, A. (2024). Body measurements in Icelandic horses used for two different purposes and the relationship to performance and usability. Comparative Exercise Physiology, 20, 35-44.

Ragnarsson, S., Víkingsdóttir, S. V., and Stefánsdóttir, G. J. (2024). Initial Impact of Different Feeding Methods on Feed Intake Time in Stabled Icelandic Horses. Animals, 14(8), 1211.

Guðmundsson, J., Óskarsson, H., Jansen, E., Kristinsson, S. Þ., Kjeld, A., & Gíslason, E. M. (2024). Low nitrous oxide fluxes from mineral affected peatland soils in Iceland. Agriculture, Ecosystems & Environment, 376, 109247.

Smit, I. H., Hernlund, E., Persson‐Sjodin, E., Björnsdóttir, S., Gunnarsdottir, H., Gunnarsson, V., ... and Serra Braganca, F. M. (2024). Adaptation strategies of the Icelandic horse with induced forelimb lameness at walk, trot and tölt. Equine Veterinary Journal, 56(3), 617-630.

2023

Ögren, G., Ragnarsson, S., and Jansson, A., 2023. Effects of forage phosphorous content on faecal phosphorous excretion and possible markers of low phosphorous intake in foals fed forage‐only diets. Journal of Animal Physiology and Animal Nutrition, 1-7. 

2022

Rhodin, M., Smit, I. H., Persson-Sjodin, E., Pfau, T., Gunnarsson, V., Björnsdóttir, S., ... & Hernlund, E. (2022). Timing of vertical head, withers and pelvis movements relative to the footfalls in different equine gaits and breeds. Animals, 12(21), 3053.

2021
Jansson, A., Gunnarsson, V.Þ., Ringmark, S., Ragnarsson, S., Söderroos, D., Ásgeirsson, E., Jóhannsdóttir, T.R., Liedberg, C. and Stefánsdóttir, G.J. Increased body fat content in horses alters metabolic and physiological exercise response,
decreases performance, and increase locomotion asymmetry. Physiological Reports, 9 (11) :e14824. doi:10.14814/phy2.14824.

Stefánsdóttir, G.J., Jansson, A., Ragnarsson, S. and Gunnarsson, V.Þ. Speed of gaits in Icelandic horses and relationships to sex, age, conformation measurements and subjective judges’ scores. Comparative Exercise Physiology, 17 (2) 151-160.

Jansson, A., Harris, P., Davey, S.L., Luthersson, N., Ragnarsson, S., and Ringmark, S., (2021). Straw as an Alternative to Grass Forage in Horses—Effects on Post-Prandial Metabolic Profile, Energy Intake, Behaviour and Gastric Ulceration. Animals, 11 (8) 2197. https://doi.org/10.3390/ani11082197

2017
Julius, H, Beetz, A and Ragnarsson, S. (2017). Bindung und Pferdegestützte Interventionen. Mensch & Pferd international, [S.l.], p. 140-153, sep. 2017. ISSN 1867-6456. doi:http://dx.doi.org/10.2378/mup2017.art23d.

Stefánsdóttir, G.J., Gunnarsson, V.Þ., Ragnarsson, S. and Jansson, A. Physiological response to an experimental 100 m flying pace race in Icelandic horses and effect of rider. Comparative Exercise Physiology, 13 (4) 205-215. doi: 10.3920/CEP170015.

Stefánsdóttir, G.J.,  Gunnarsson, V., Roepstorff, L., Ragnarsson, S. and Jansson, A. (2017). The effect of rider weight and additional weight in Icelandic horses in tölt: part I. Physiological responses. Animal 11 (9), 1558-1566. doi:org/10.1017/S1751731117000556.

Gunnarsson, V.Þ., Stefánsdóttir, G. J., Jansson, A. and Roepstorff, L. (2017). The effect of rider weight and additional weight in Icelandic horses in tölt: part II. Stride parameters responses. Animal, 11(9), 1567-1572. https://doi.org/10.1017/S1751731117000568.

2016
Jansson, A., Stefánsdóttir, G.J. and Ragnarsson, S. Plasma insulin concentration increases linearly with body condition in Icelandic horses. Short communication. Acta Veterinaria Scandinavica 58:76. doi: 10.1186/s13028-016-0258-8.

2015
Roy, R.C., Cockram, M.S., Dohoo, I.R. and Ragnarsson, S. (2105). Transport of horses for slaughter in Iceland. Animal Welfare Journal, 24(4), 485-495. https://doi.org/10.7120/09627286.24.4.485

Stefánsdóttir, G. J., Ragnarsson, S., Gunnarsson, V., Roepstorff, L. and Jansson, A. (2015). A comparison of the physiological response to tölt and trot in the Icelandic horse. Journal of Animal Science, 93(8), 3862–3870. https://doi.org/10.2527/jas.2015-9141.

2014
Stefánsdóttir G. J., Ragnarsson, S., Gunnarsson, V. and Jansson, A. (2014). Physiological response to a breed evaluation field test in Icelandic horses. Animal, 8(3), 431-439. https://doi.org/10.1017/S1751731113002309

Jansson, A., Hedenstöm, U. and Ragnarsson, S. (2014). A survey of training regimes used by top trainers of the Icelandic pace racing horse. Comparative Exercise Physiology, 10(4), 253-257. https://doi.org/10.3920/CEP140022

Stefánsdóttir G. J., Kullberg N.M. and Jansson A. (2014). Relationship between judges’ comments on pace and horses’ plasma lactate concentration in an official breed evaluation field test in Icelandic horses. (Abstract). Equine Veterinary Journal, (46)S46, 14. https://doi.org/10.1111/evj.12267_41

Stefánsdóttir, G. J., Ragnarsson, S., Gunnarsson, V. and Jansson A. (2014). A pilot study on the physiological response to an official breed evaluation field test in Icelandic horses (Abstract). Equine Veterinary Journal, 46(S46), 14. https://doi.org/10.1111/evj.12267_42

2012
Stefánsdóttir, G. J., Ragnarsson, S. and Jansson, A. (2012). A comparison of a portable blood lactate analyser and laboratory plasma analysis of blood samples from exercised horses. Comparative Exercixe Physiology, 8(3-4), 227-231. https://doi.org/10.3920/CEP13002

2011
Ragnarsson, S. and Jansson, A., (2011). Comparison of grass haylage digestibility and metabolic plasma profile in Icelandic and Standardbred horses. Journal of Animal Physiology and Animal Nutrition, 95(3), 273-279. https://doi.org/10.1111/j.1439-0396.2010.01049.x

2010
Ragnarsson, S. and Lindberg, J. E. (2010). Impact of feeding level on digestibility of a haylage-only diet in Icelandic horses. Journal of Animal Physiology and Animal Nutrition, 94(5), 623-627. https://doi.org/10.1111/j.1439-0396.2009.00947.x

Ragnarsson, S. and Lindberg, J. E.  (2010). Nutritional value of mixed grass haylage in Icelandic horses. Livestock Science, 131(1), 83-87. https://doi.org/10.1016/j.livsci.2010.03.003

2008
Ragnarsson, S. and Lindberg, J. E.  (2008). Nutritional value of timothy haylage in Icelandic horses. Livestock Science, 113(2-3), 202-208. https://doi.org/10.1016/j.livsci.2007.03.010

2003
Sigríður Björnsdóttir (2003). Spatt í íslenskum hrossum: Áhættuþættir, sjúkdómsferill og horfur. Freyr, 99, 57-62.
Valberg Sigfússon (2003). Ending og förgunarástæður íslenskra hrossa. Freyr, 95, 41-45.

2002
Sigurjónsdóttir, H. and Gunnarsson, V. (2002). Controlled Study of Early Handling and Training of Icelandic Foals. Havemeyer Workshop on Horse Behavior and Welfare, Hólar Iceland June 13-15 2002.

2001
Axelsson, M., Björnsdóttir, S., Eksell,P., Häggström, J., Sigurdsson, H. and Carlsten, J. (2001). Risk factors associated with hindlimb lameness and degenerative joint disease in the distal tarsus of Icelandic horses. Equine Veterinary Journal, 33(1), 84-90. https://doi.org/10.2746/042516401776767502

2000
Morel, M.C.G. and Gunnarsson, V. (2000). A survey of the fertility of Icelandic stallions. Animal Reproduction Science, 64(1-2), 49-64. https://doi.org/10.1016/S0378-4320(00)00192-5

Björnsdóttir, S., Axelsson, M., Eksell, P., Sigurdsson, H. and Carlsten. J. (2000). Radiographic and clinical survey of degenerative joint disease in the distal tarsal joints in Icelandic horses. Equine Veterinary Journal, 32(3), 268-272. https://doi.org/10.2746/042516400776563590

Björnsdóttir, S., Árnason, Th., Axelsson, M., Eksell, P., Sigurðsson, H. and Carlsten, J. (2000). The heritability of degenerative joint disease in the distal tarsal joints in Icelandic horses. Livestock Production Science, 63(1), 77-83. https://doi.org/10.1016/S0301-6226(99)00112-8

Ritrýndar ráðstefnugreinar:
2016
Lindberg, J.E. and Ragnarsson, S. (2016). Digestion pattern in horses of fibre in grass haylage cut at different stages of maturity. 5th EAAP International Symposium on Energy and Protein Metabolism and Nutrition. EAAP Scientific Series, Volume 137.

2014
Ragnarsson, S. and Jansson, A. (2014). A Subjective Evaluation of Muscle Conformation in Horses Subjected to Pace Training or not. Equine Veterinary Journal, 46(S46), 8.  https://doi.org/10.1111/evj.12267_24

Jansson, A. Hedenström, U. and Ragnarsson, S. (2014). A Questionnaire on Training of the Icelandic Pace Horse. Equine Veterinary Journal, 46(S46). 6-7. https://doi.org/10.1111/evj.12267_18

Roy, R.C., Cockram, M.S., Dohoo, I.R. and Ragnarsson, S. (2104). Welfare of horses transported for slaughter in Iceland. Proceedings of the 6th international conference on the assessment of animal welfare at farm and group level. Wageningen Academic Publishers; 01/2014 https://doi.org/10.7120/09627286.24.4.485

2010
Ragnarsson, S. and Lindberg, J.E. (2010). Maintenance energy and nitrogen requirements of the Icelandic horse. In: Energy protein metabolism and nutrition. Grovetto, G. M. (ed). 3rd EAAP International Symposium on Energy and Protein Metabolism and nutrition. EAAP publication No. 127, 595-596.

Lindberg, J.E. and Ragnarsson, S. (2010). Prediction of energy digestibility and energy content in forage fed to horses. In: Energy protein metabolism and nutrition. Grovetto, G. M. (ed). 3rd EAAP International Symposium on Energy and Protein Metabolism and nutrition. EAAP publication No. 127, 637-638.

Lindberg, J.E. and Ragnarsson, S. (2010). Prediction of energy content in forage for horses. Proceedings of the 1st Nordic Feed Science Conference. Uppsala, Sweden. Rapport 274, 127-128.

Bækur:

2022 Julius, H., Heidlmair, P. and Ragnarsson, S. (2022). Von Gewittern, Feuerlauschern and Wiedergefundenen Prinzen. 209 pages. ISBN: 9798839378148
2020 Julius, H., Uvnäs-Moberg, K. and Ragnarsson, S. (2020). Am Du zum Ich: Bindungsgeleitete Pädagogik. 245 pages . ISBN-13:979-8669304621

Bókakaflar:
2021   Guðrún J. Stefánsdóttir og Víkingur Gunnarsson The Star of the Show: the Icelandic Horse. (kafli 3, bls. 26-47).
           Í Humans, Horses and Events Management.  (ed) Katherine Dashper,
           Guðrún Helgadóttir og Ingibjörg Sigurðardóttir.
2021   Guðrún J. Stefánsdóttir og Höskuldur Jensson. Exercise Physiology of Horses, bókakafli 3 í knapamerkjabók 5, (ensk útgáfa).
2019   Guðrún J. Stefánsdóttir og Höskuldur Jensson. Þjálfunarlífeðlisfræði hesta, bókakafli 3 í knapamerkjabók 5.
2017   Guðrún J. Stefánsdóttir. Feeding Horses, chapter 1, pp 4-21, í knapamerkjabók 3, (ensk útgáfa).
2012   Guðrún J. Stefánsdóttir. Fóðrun hesta, 1. kafli, bls 4-19, í knapamerkjabók 3, (íslensk útgáfa). 

Útdrættir/Abstracts/veggspjöld:
2022
Stefánsdóttir, G.J., Göransson, P., Vittrup, K,. Hognestad, M. and Gunnarsson, V. (2022). Heart rate in a rider of Icelandic horses when ridden in low and high head and neck positions in slow tölt. International Conference on Equine Exercise Physiology, Uppsala Sweden, 26. June-1. July 2022. Comparative Exercise Physiology, vol 18, supplement 1, p19.
2022
Gunnarsson, V., Hognestad, M., Vittrup, K. and Stefánsdóttir, G.J. (2022). Effect of low and high head and neck position on stride parameters of slow tölt in Icelandic horses. International Conference on Equine Exercise Physiology, Uppsala Sweden, 26. June-1. July 2022. Comparative Exercise Physiology, 18 (S1), p59.
2022
Söderroos, D., Stefánsdóttir, G.J., Gunnarsson, V., Ragnarsson, S. And Jansson, A. (2022). Back conformation traits in Icelandic horses from two different disciplines. International Conference on Equine Exercise Physiology, Uppsala Sweden, 26. June-1. July 2022. Comparative Exercise Physiology, 18 (S1), p75.
2022
Stefánsdóttir, G.J., Vittrup, K,. Hognestad, M. and Gunnarsson, V. (2022). Physiological responses to low and high head and neck positions in Icelandic horses in slow tölt. International Conference on Equine Exercise Physiology, Uppsala Sweden, 26. June-1. July 2022. Comparative Exercise Physiology, 18 (S1), p91.
2018
Stefánsdóttir, G.J., Sverrisdottir, E.R., Høegh, S. and Gunnarsson, V. (2018). Effects of boots on heart rate and respiratory rate in Icelandic horses at trot on a treadmill. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise Physiology, 14 (S1), p11.
2018
Gunnarsson, V., Høegh, S., Sverrisdottir, E.R. and Stefánsdóttir, G.J. (2018). Effects of boots on movements in trot of Icelandic horses on a treadmill. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise Physiology, 14 (S1), p 62.
2018
Stefánsdóttir, G.J., Gunnarsson, V., Ragnarsson, S. and Jansson, A. (2018).  Relationship between speed, plasma lactate concentration
and judgement scores in Icelandic horses. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise
Physiology, vol 14, (S1), p 13.
2018
Ragnarsson, S., Hinriksson, G.Á. and Stefánsdóttir, G.J. (2018). Impact of transport by road and air on heart rate in Icelandic horses. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise Physiology, 14 (S1), p 33.
2018
A. Jansson, Jóhannsdóttir, T., Ásgeirsson, E., Liedberg, C., Gunnarsson, V., Ragnarsson S. and Stefánsdóttir, G.J. (2018). Improved performance indices in horses following restricted diet. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise Physiology, 14 (S1), p 19.
2018
Ringmark, S., Ásgeirsson, E., Jóhannsdóttir, T., Liedberg, C., Stefánsdóttir, G.J., Gunnarsson, V. and Jansson, A. (2018). 
Overfeeding may affect locomotion symmetry. International Conference on Equine Exercise Physiology, Lorne Victoria Australia, 12.-16. nóvember 2018. Comparative Exercise Physiology, 14 (1), p20.
2016
G.J. Stefánsdóttir, S. Ragnarsson, V. Gunnarsson og A. Jansson. (2016). Líkamlegt álag á íslensk hross í reiðdómi í kynbótasýningu. Veggspjald og ágrip. Ráðstefnan Landsýn haldin á Hvanneyri 4.mars 2016.
2016
G.J. Stefánsdóttir, S. Ragnarsson, V. Gunnarsson, L. Roepstorff og A. Jansson. (2016). Samanburður á líkamlegu álagi hjá íslenskum hestum á tölti og brokki á sama hraða. Veggspjald og ágrip. Ráðstefnan Landsýn haldin á Hvanneyri 4. mars 2016.
2016
Stefánsdóttir, G.J., V. Gunnarsson, S. Ragnarsson og A. Jansson. (2016). Líkamlegt álag á íslenska hestinn á 100 m flugskeiði, samjöfnuður við keppni. Veggspjald og ágrip. Ráðstefnan Landsýn haldin á Hvanneyri 4.mars 2016 (á íslensku).
2016
G.J. Stefánsdóttir, V. Gunnarsson, L. Roepstorff, S.Ragnarsson og A. Jansson. (2016). Áhrif af þunga knapa á líkamlegt álag á íslenska hestinn á tölti. Veggspjald og ágrip. Ráðstefnan Landsýn haldin á Hvanneyri 4. mars 2016.
2015
Jansson A., Stefánsdóttir, G.J., Torres, J.C.R and Sveinn Ragnarsson. (2015). Plasma insulin concentration is affected by body condition in Icelandic horses. Acta Veterinaria Scandinavica, 57 (1):01. https://doi.org/10.1186/1751-0147-57-S1-O1
2014
Stefánsdóttir, G.J., Ragnarsson, S., Gunnarsson V. and Jansson, A.  (2014). A pilot study on the physiological response to an official breed evaluation field test in Icelandic horses. International Conference on Equine Exercise Physiology, Chester UK, 16.-20. júní 2014. Equine Veterinary Journal, 46 (S46), p14. https://doi.org/10.1111/evj.12267_42
2014
Stefánsdóttir, G.J., Kullberg, N.M. and Jansson, A. (2014). Relationship between judges’ comments on pace and horses’ plasma lactate concentration in an official breed evaluation field test in Icelandic horses. International Conference on Equine Exercise Physiology, Chester UK, 16.-20. júní 2014. Equine Veterinary Journal, 46 (S46), p14. https://doi.org/10.1111/evj.12267_41
2005
Stefánsdóttir, G.J. and Arnadottir, S. Selenium status in Icelandic horses assessed indirectly. (2005). NJF Seminar no.370 Reykjavik, Iceland, 15-17. August 2005, rit LBHÍ nr 3, Essential trace elements for plants, animals and humans, pp 83-85.
1997
Hyslop, J.J., Jessop, N.S., Stefansdottir, G.J. and Cuddeford, D. (1997). Comparative protein and fibre degradation measured in situ in caecum of ponies and in the rumen of steers. Proceedings of the British Society of Animal Science, Scarborough, March, p.121. https://doi.org/10.1017/S1752756200595623
1997
Hyslop, J. J., Jessop, N. S., Stefansdottir, G. J. & Cuddeford, D. (1997). Comparative degradation in situ of four concentrate feeds in the caecum of ponies and the rumen of steers. Proc. 15th Equine Nutrition and Physiology Symposium. TX, pp. 116-117.
1996
Hyslop, J.J., Stefansdottir, G.J., Cuddeford, D. (1996). The effect of incubation sequence on in situ degradation of concentrate feed components in the caecum of ponies. British Society of Animal Science (BSAS) Winter Meeting, 18-20 March.
1996
Stefansdottir, G.J., Hyslop, J.J., Cuddeford, D. (1996). The in situ degradation of four concentrate feeds in the caecum of ponies. British Society of Animal Science (BSAS) Winter Meeting, 18-20 March. of Animal Science (BSAS) Winter Meeting, 18-20 March.

Aðrar birtingar -fræðsluefni fyrir almenning:
2021  Guðrún Stefánsdóttir (2021, 18. ágúst) Er gott fyrir hesta að vera eingöngu á sinubeit? Vísindavefur HÍ. https://www.visindavefur.is/svar.php?id=82042 
2021  Guðrún Stefánsdóttir. (2021, 4. mars) Er íslenski hesturinn smáhestur? Vísindavefur HÍ. https://www.visindavefur.is/svar.php?id=81155
2020  Guðrún Stefánsdóttir. (2020, 4.mars) Er vitað hversu þungan knapa íslenski hesturinn getur borið með góðu móti? Vísindavefur HÍ. https://www.visindavefur.is/svar.php?id=78533 
2020  Guðrún Stefánsdóttir. (2020, 4. febr.) Eru allir hestar sem eru albinóar blindir ? https://www.visindavefur.is/svar.php?id=71534
2019  Guðrún Stefánsdóttir.  Hversu mikla þyngd getur íslenski hesturinn borið? (Fræðsluefni/Viðtal á vefnum “Horses of Iceland”, íslenska). https://www.horsesoficeland.is/is/samfelag/sogur/hversu-mikla-thyngd-getur-islenski-hesturinn-borid/1111
2019  Guðrún Stefánsdóttir. Wie viel gewicht kann das Islandpferd tragen? (Fræðsluefni/Viðtal á vefnum “Horses of Iceland”, þýska).
2019  Guðrún Stefánsdóttir.  How much weight can the Icelandic horse carry? (Fræðsluefni/Viðtal á vefnum “Horses of Iceland”, enska).
2015  Guðrún Stefánsdóttir.  Lífeðlisfræðileg svörun íslenska hestsins við álagi. Eiðfaxi, 6, 34-39.
2015  Guðrún Stefánsdóttir. (2015). Islandshästars fysiologiska respons på arbeit. Islandshästen, 6, 6-12.
2015  Guðrún Stefánsdóttir. (2015). Sådan påvirker ridningen de islandske hestes fysiologi.Tölt, 9, 18-23.
2010  Guðrún Stefánsdóttir.  (2010). The feeding of stabled riding horses Eiðfaxi, (ensk útgáfa), 2, 46-50.
2010  Guðrún Stefánsdóttir.  (2010). Fóðrun reiðhesta á húsi, Eiðfaxi, 2, bls 52-56.
2010  Guðrún Stefánsdóttir.  (2010). Útifóðrun hrossa, Eiðfaxi,1, bls 20-23.
2008  Guðrún Stefánsdóttir og Sigríður Björnsdóttir. (2008). Mat á holdafari hesta (2. útgáfa, endurbætt), 7, 44-49.
2006  Guðrún Stefánsdóttir. (2006) Litaerfðir hrossa. Stóðhestablað, Eiðfaxi, Mars.
2003  Sigríður Björnsdóttir (2003). Spatt í íslenskum hrossum: Áhættuþættir, sjúkdómsferill og horfur. Freyr, 99, 57-62.
2003  Valberg Sigfússon (2003). Ending og förgunarástæður íslenskra hrossa. Freyr, 95, 41-45.
2002  Sigurjónsdóttir, H. and Gunnarsson, V. (2002). Controlled Study of Early Handling and Training of Icelandic Foals.
          Havemeyer Workshop on Horse Behavior and Welfare, Hólar Iceland June 13-15 2002.
2001  Guðrún Stefánsdóttir og Sigríður Björnsdóttir. (2001). Mat á holdafari hrossa. Freyr -hrossaræktarblað, 50-51.
2001  Guðrún Stefánsdóttir og Sigríður Björnsdóttir. (2001). Mat á holdafari hrossa. Eiðfaxi-ræktun, 60-65.
2000  Morel, M.C.G. and Gunnarsson, V. (2000). A survey of the fertility of Icelandic stallions. Animal Reproduction Science,
          64(1-2), 49-64. https://doi.org/10.1016/S0378-4320(00)00192-5
2000  Magnús Lárusson. (2000). Líkamleg þjálfun, fyrir keppnis- og ferðahesta. Eiðfaxi, 1, 28-30.
2000  Magnús Lárusson. (2000). Þolþjálfun. Eiðfaxi, 2, 30-31.
1999  Guðrún Stefánsdóttir og Vilhjálmur Svansson. (1999). Þróunarverkefni með fósturvísaflutninga í íslenskum hryssum.
          Freyr-hrossaræktarblað, 95 (1). 31-32.
1999  Höskuldur Jensson. (1999). Fósturvísaflutningar á milli hryssna: Þróunarverkefni við Hólaskóla: Seinni hluti. Freyr, 95 , 35-37.
1998  Guðrún Stefánsdóttir. (1998). Fóðurþarfir stóðhryssna. Eiðfaxi, stóðhestablað bls. 34-35.
1997  Sigríður Björnsdóttir og Helgi Sigurðsson. (1997). Spatt er alvarlegt vandamál í íslenskum hrossum. Eiðfaxi, 9,12-17.
1997  Sigríður Björnsdóttir. (1997). Er spattið arfgengur sjúkdómur? Hesturinn okkar, okt, 25-27.
1997  Víkingur Gunnarsson. (1997). Rannsókn á frjósemi íslenskra hrossa, fyrri grein. Eiðfaxi, 11,10-13.
1997  Víkingur Gunnarsson. (1997). Rannsókn á frjósemi íslenskra hrossa, seinni grein. Eiðfaxi, 12,16-18.

Rannsóknarskýrslur:
2008 Litir og litbrigði íslenska hestsins, 69 bls með 177 ljósmyndum af hestalitum. Rit LBHÍ nr. 16.     http://www.lbhi.is/sites/lbhi.is/files/gogn/vidhengi/thjonusta/utgefid_efni/RitLbhi/rit_lbhi_nr_16.pdf

Dagatal íslenskra vísindamanna á vísindavef HÍ:
2018 Hvað hefur vísindamaðurinn Guðrún Jóhanna Stefánsdóttir rannsakað? (umfjöllun á vísindavef HÍ, 16.apríl 2018).

Ljósmyndir:
2009 Guðrún Stefánsdóttir. (2009). Mynd nr. 8.97, bls 180 af bleikskjóttum hesti (Red dun tobiano).
         Í Equine Color Genetics (third edition) (2009). Höfundur: Sonenberg DP. Wiley- Blackwell USA. 
2008 Guðrún Stefánsdóttir. (). Ljósmyndir í greininni “fortaming unghrossa, hafðu það rétt frá byrjun”. skrifuð af Antoni Páli Níelssyni, Eiðfaxi, tbl 1 bls. 58-61.