Phosphorus availability of rock phosphates as compared with feed-grade phosphates for swine - Souza, Luiz Waldemar de Oliveira; Moretti, Aníbal de Sant'Anna; Tucci, Fernanda Marcussi; Souza, Nedilse Helena de; Leal, Paulo Ademar Martins; Anzai, Nelson Haruo (Revista Brasileira de Zootecnia, 2009)