Stancari, R.C.A. and Correia, M. 2010. Occurrence of Cryptosporidium spp oocysts and Giardia spp cysts in water sources and public water supplies. Instituto Adolfo Lutz Journal - RIAL. 69, 4 (Apr. 2010), 453–460. DOI:https://doi.org/10.53393/rial.2010.v69.32601.