Chieffi, P. P.; Müller, E. E. 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 . Rev. saúde pública 1976, 10 (4), 367-372. https://doi.org/10.1590/S0034-89101976000400010.