Martínez-Aguilar, Y. et al. 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 (Jan. 2015), 7–14. DOI:https://doi.org/10.19053/01228420.4109.