Santos, Silvia Edelweiss Crusco dos, Camila Infantosi Vannuchi, Sandra Satzinger, Mayra Elena Ortiz D’Avila Assumpção, and José Antonio Visintin. 1999. “Comparison of Five Extenders for Canine Semen Freezing”. Brazilian Journal of Veterinary Research and Animal Science 36 (5): 244-49. https://doi.org/10.1590/S1413-95961999000500004.