Louvandini, Helder, and Dorinha Miriam Silber Schmidt Vitti. “Endogenous P Loss in Sheep Fed With Different P Levels”. Pesquisa Agropecuaria Brasileira, vol. 29, no. 1, Jan. 1994, pp. 01-91, doi:10.1590/S1678-3921.pab1994.v29.4038.