Valadares, Teresinha E., Paulo Marcos Z. Coelho, J. Pellegrino, and Ivan Barbosa M. Sampaio. 1981. “Schistosoma Mansoni: Oviposition of Different Strains (LE’, Belo Horizonte; SP, São Paulo, and ST, Liberia) in Mice Infected With a Couple of Worms”. Revista Do Instituto De Medicina Tropical De São Paulo 23 (1): 1-5. https://revistas.usp.br/rimtsp/article/view/196822.