FERREIRA, C. S., AMATO NETO, V., ALARCÓN, R. S. R., & GAKIYA, E. (2001). Identification of Cryptosporidium spp. oocysts in fecal smears stained with Heidenhain’s iron hematoxylin . Revista Do Instituto De Medicina Tropical De São Paulo, 43(6), 341-342. https://revistas.usp.br/rimtsp/article/view/30562