Maiorka A, da Silva AVF, Santin E, Jr. JMP, Macari M. Broiler Breeder Age and Dietary Energy Level on Performance and Pancreas Lipase and Trypsin Activities of 7-days Old Chicks. Int. J. Poult. Sci. 2004;3(3):234–237. doi:10.3923/ijps.2004.234.237