R. J. Andrade-Becerra, Z. E. Caro-Carvajal, M. O. Pulido-Medellín, J. L. Porras-Vargas, and J. C. Vargas-Abella, “Prevalence of Mastitis Causing - Bacteria in the Milking Farms of Toca (Boyacá, Colombia)”, Cien. Agri., vol. 11, no. 1, pp. 47–53, Jan. 2014.