YAN, F.; KERSEY, J.H.; FRITTS, C.A.; WALDROUP, P.W. Effect of Phytase Supplementation on the Calcium Requirement of Broiler Chicks. International Journal of Poultry Science, Pakistan, v. 5, n. 2, p. 112–120, 2006. DOI: 10.3923/ijps.2006.112.120. Disponível em: https://ijpsjournal.org/index.php/ijps/article/view/496. Acesso em: 22 sep. 2025.