Santana, M.H.M., Costa, F.G.P., Guerra, R.R., Figueiredo Júnior, J.P., Lima, M.R. de e Pinheiro, S.G. 2021. Methionine plus Cystine Levels for Light Laying Hens on Growth Phase. Revista Principia. 1, 53 (fev. 2021), 180–189. DOI:https://doi.org/10.18265/1517-0306a2020v1n53p180-189.