Activity of oxamniquine at skin, pulmonary and sexual maturation phases, on a Schistosoma mansoni strain (R1) previously reported as resistant at the adult phase - Paulo Marcos Z Coelho; Fábio Ribeiro; Rômulo T Mello; Francisco C Lima e Silva; José Augusto Nogueira-Machado (Memorias do Instituto Oswaldo Cruz, 1998)