Bellaver, C., Gomes, P. C. and Fialho, E. T. (1991) “Rock phosphate in swine diets formulated according to the available phosphorus”, Pesquisa Agropecuaria Brasileira, 26(10), pp. 1771–1776. doi: 10.1590/S1678-3921.pab1991.v26.3524.