Augusto, C.; Gacek, F.; Artes, R. Seasonal Variations in Stallion Sperm Features and Their Relationship With Fertility of the Breeding Stock. Braz. J. Vet. Res. Anim. Sci. 1997, 34 (3), 167-172. https://doi.org/10.11606/issn.2318-3659.v34i3p167-172.