Effects of different levels of crude protein and lysine on performance and nitrogen excretion of the commercial laying hens - Faria, Douglas Emygdio de; Rizzo, Mayra Fernanda; Deponti, Bruno José; Rombola, Luis Gustavo; Silva, F H; Araújo, Lúcio Francelino; Junqueira, Otto Mack (Annual Meeting of the Southern Poultry Science Society, 2004)