Martinez et al., 1990. J. Anim. Sci., 68 (9): 2748-2755 Document reference Martinez, G. M. ; Knabe, D. A., 1990. Digestible lysine requirements of starter and grower pigs. J. Anim. Sci., 68 (9): 2748-2755Web http://www.journalofanimalscience.org/content/68/9/2748Citation key Martinez et al., 1990