Hamilton, Thais Rose dos Santos, Carlos de Sousa Lucci, Ed Hoffmann Madureira, Suelen Narimatsu, Rodrigo Hayashi Goulart, Jefferson GIL, Valter Fontolan, and Marcos Sampaio Baruselli. 2009. “Seminal Characteristics of Rams Supplement or Not With Urea and Two Sources of Sulphur”. Brazilian Journal of Veterinary Research and Animal Science 46 (1):54-61. https://doi.org/10.11606/issn.1678-4456.bjvras.2009.26750.