P. Avilez, J.; Meyer, J.; Nahed, J.; A. Ruiz, F.; Mena Guerrero, Y.; Castel Genis, J. M. Classification, Characterisation and Strategies for Improvement of Cattle and Sheep Pasture Systems in Marginal Areas of Southern Chile. Rev. Mex. Cienc. Pecu. 2018, 9, 240-262.