Núñez-Fernández, Fidel Ángel, et al. “ Comparison of Several Coproparasitological Techniques for Diagnosis of Soil-Transmitted Helminthiasis ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 33, no. 5, Oct. 1991, pp. 403-6, https://revistas.usp.br/rimtsp/article/view/28861.