Torres, Patricio, et al. “ Blastocystosis and Other Intestinal Protozoan Infections in Human Riverside Communities from - Valdivia River Basin, Chile ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 34, no. 6, Dec. 1992, pp. 557-64, https://revistas.usp.br/rimtsp/article/view/28981.