Conte, Ademir José, et al. “Effect of Phytase on the Bioavailability of Phosphorus of Rice Bran in Broilers Chickens”. Pesquisa Agropecuaria Brasileira, vol. 37, no. 4, Apr. 2002, pp. 547-52, doi:10.1590/S1678-3921.pab2002.v37.6373.