Queiroz, Maisa Leite de, Marcelo Simonsen, Maria Aparecida Paschoalotti, and Pedro Paulo Chieffi. 2006. “ Frequency of Soil Contamination by Toxocara Canis Eggs in the South Region of São Paulo Municipality (SP, Brazil) in a 18 Month Period ”. Revista Do Instituto De Medicina Tropical De São Paulo 48 (6): 317-19. https://www.revistas.usp.br/rimtsp/article/view/31036.