Peña Joya, M. A., Góngora, A., & Jiménez, C. (2012). Infectious agents affecting fertility of bulls, and transmission risk through semen. Retrospective analysis of their sanitary status in Colombia. Revista Colombiana De Ciencias Pecuarias, 24(4), 634–646. https://doi.org/10.17533/udea.rccp.324723