SANTOS, T. A. DOS; GERALDO, A.; MACHADO, L. C.; GONÇALVES, R. A.; PELÍCIA, K.; SIMÃO, S. D. <b&gt;Digestible lysine levels in semi-heavy laying hens in the period from 28 to 44 weeks of age. Acta Scientiarum. Animal Sciences, v. 36, n. 2, p. 145-150, 24 mar. 2014.