Fregonesi, Brisa Maria, et al. “Cryptosporidium and Giardia: Challenges in Public Water Supplies: DOI: 10.15343 0104-7809.2012364602609”. O Mundo Da Saúde, vol. 36, no. 4, Oct. 2012, pp. 602-9, https://revistamundodasaude.emnuvens.com.br/mundodasaude/article/view/469.