Ortíz A., M. B., C. A. Rosales J., Y. M. Aguilar V., Y. A. Murillo A., G. Serpa G., T. Paguay N., and G. Coronel Á. “Exploratory Study on the Presence of Contaminants in Raw Milk from Tarqui in Southern Ecuadorian Highlands”. Maskana, vol. 8, no. 1, June 2017, pp. 121-7, doi:10.18537/mskn.08.01.11.