Saa, L. R., L. T. Guzmán, N. C. Fierro, L. M. Castro, F. Reyes-Bueno, and A. Carbonero. “Seroprevalence and Risk Factors Associated With Bovine Leukemia Virus (BLV) Seropositivity in Cattle Herds from Ecuador”. Revista Colombiana De Ciencias Pecuarias, vol. 34, no. 3, Aug. 2020, pp. 177-88, doi:10.17533/udea.rccp.v34n3a01.