Coêlho, Matheus Diniz Gonçalves, et al. “WILLIS METHOD MODIFICATION WITH A VIEW TO IMPROVING ROUTINE COPROPARASITOLOGICAL DIAGNOSIS”. Revista De Patologia Tropical Journal of Tropical Pathology, vol. 48, nº 1, abril de 2019, p. 25-34, doi:10.5216/rpt.v48i1.55402.