M. G. M. Chacur, A. M. N. Castillo, and L. M. Guaberto, “Influence of the dry and rainy seasons upon plasma seminal (SDS-PAGE) and characteristics of the ejaculate from bulls Bos taurus indicus”, Semina: Ciênc. Agrár., vol. 32, no. 4, pp. 1565–1574, Oct. 2011.