Romano, Marco Aurélio, Raul Gastão Mucciolo, and Antonio Emídio Dias Feliciano e Silva. 1998. “Reproductive Biology of the Mare: Oestrous Cycle and Ovulation Time”. Brazilian Journal of Veterinary Research and Animal Science 35 (1): 25-28. https://doi.org/10.1590/S1413-95961998000100004.