Monroy Peña, G. M., Hurtado Nery, V. L. . and Ospina Patiño, H. (2015) “Experiences about supplementation of ruminants developed in the Federal University of Río Grande do Sul, Brazil”, Revista Sistemas de Producción Agroecológicos, 6(2), pp. 109-123. doi: 10.22579/22484817.674.