Phetudomsinsuk, Kanittha. 2017. “Investigation into the Effect of Prostaglandin F2a, GnRH Analogue and HCG on Induction of Ovulation in Mares”. The Thai Journal of Veterinary Medicine 47 (4):493-99. https://he01.tci-thaijo.org/index.php/tjvm/article/view/107372.