J. R. Galaviz-Rodríguez, J. E. Ramírez-Bribiesca, S. Vargas-López, J. L. Zaragoza-Ramírez, J. D. Guerrero-Rodríguez, M. Mellado-Bosque, and R. G. Ramírez. "Effect of three production systems of central Mexico on growth performance of five lamb genotypes." Journal of Animal and Plant Sciences, vol. 24, no. 5, 2014, pp. 1303-1308.