Villar, D., and D. J. Schaeffer. “Ivermectin Use on Pastured Livestock in Colombia: Parasite Resistance and Impacts on the Dung Community”. Revista Colombiana De Ciencias Pecuarias, vol. 36, no. 1, May 2022, pp. 3-12, doi:10.17533/udea.rccp.v36n1a2.