Stan, F., (2015). Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Veterinary Medicine 72(2), 288-295. University of Agricultural Sciences and Veterinary Medicine, Cluj-Napoca, Romania. English language
Marques, L. M., Amorim, A. T., Martins, H. B., Rezende, I. S., Barbosa, M. S., Lobão, T. N., Campos, G. B., Timenetsky, J., (2013). Veterinary Microbiology 167(3/4), 670-674. Elsevier B. V., Amsterdam, Netherlands. English language
Hong WanShu, Chen ShiXi, Zheng WeiYun, Hong WanShu, Chen ShiXi, Xiao Ying, Zhang QiYong, (2006). Journal of the World Aquaculture Society 37(4), 363-369. Blackwell Publishing, Boston, USA. English language
Sreekumar, S., Adiyodi, R. G., (2000). Journal of Experimental Zoology, India 3(2), 147-152. Department of Zoology, D.A.V. (P.G.) College, Muzaffarnagar, India. English language
Qin DaNian, She BaiRong, She YunChu, Wang JianHong, (2000). Asian Journal of Andrology 2(2), 99-102. Science Press, Beijing, China. English language
Stradaioli, G., Sylla, L., Mazzarelli, F., Zelli, R., Rawadi, G., Monaci, M., (1999). Veterinary Research 30(5), 457-466. English language
Campero, C. M., Roppel, M. K., (1998). Revista de Medicina Veterinaria (Buenos Aires) 79(6), 404-408. Spanish language
Schoonen, W. G. E. J., Lambert, J. G. D., Oordt, P. G. W. J. van, (1988). General and Comparative Endocrinology 70(1), 91-100. English language
Schoonen, W. G. E. J., Granneman, J. C. M., Lambert, J. G. D., Viveen, W. J. A. R., Oordt, P. G. W. J. van, (1987). Comparative Biochemistry and Physiology, B (Comparative Biochemistry) 87B(4), 687-695. English language
Wu, L. Y., (1958). Canadian Journal of Zoology 36(4), 569-576. English language