Chieffi, P.P. and Müller, E.E. (1976) “ Prevalence of Toxocara canis in dogs, and the finding of ova of Toxocara species in the soil of public places in the urban areas of Londrina, State of Paraná, Brazil ”, Revista de Saúde Pública, 10(4), pp. 367–372. doi:10.1590/S0034-89101976000400010.