Martínez-Aguilar, Y, Rodríguez-Bertot, R, Betancur-Hurtado, C, Más-Toro, D, Olmo-González, C and Valdivié-Navarro, M (2015) “Dietary Supplementation of Increasing Levels of DLMethionine and L-Lysine in Hypoproteic Diets for Laying Hens Improves Productivity and Egg Quality”, Ciencia y Agricultura, 12(1), pp. 7–14. doi: 10.19053/01228420.4109.