(2012). Sexual Development 6(1/3), 1-160. S Karger AG, Basel, Switzerland. English language
(2012). BSAVA Congress 2012, The ICC/NIA, Birmingham, UK, 11-15 April, 2012. Scientific Proceedings Veterinary Programme, 594 pp. British Small Animal Veterinary Association, Quedgeley, UK. English language
Svoboda, M. , (2006). 2006 World Congress Proceedings. 31st World Small Animal Association Congress, 12th European Congress FECAVA, & 14th Czech Small Animal Veterinary Association Congress, Prague, Czech Republic, 11-14 October, 2006, 905 pp. Czech Small Animal Veterinary Association, Prague, Czech Republic. English language
Dennis, J. A., Healy, P. J., (1999). Research in Veterinary Science 67(1), 1-6. English language
Ban, A., Sakai, J. I., Koya, M., Watanabe, D., Abe, S., Abe, S., Itagaki, M., Hoshi, M., Inaba, M., Ono, K., Suzuki, K., (1999). Journal of the Japan Veterinary Medical Association 52(2), 85-89. Japanese language
Kollias-Baker, C., (1999). Veterinary Clinics of North America, Equine Practice 15(3), 589-602. English language
Nakagiri, M., Kunieda, T., Ide, H., Yoneda, K., Takami, M., Ogawa, H., (1999). Animal Science Journal 70(5), 372-374. English language
Ban, A., (1996). Tohoku Journal of Veterinary Clinics 19(2), 63-73. Japanese language
Healy, P. J., Malmo, J., (1998). Australian Veterinary Journal 76(10), 699-700. English language
Ogata, Y., Takahashi, K., Urushiyama, Y., Satoh, H., Sakai, J., Watanabe, E., Itagaki, M., (1997). Journal of the Japan Veterinary Medical Association 50(5), 271-273. Japanese language