Gheller, J.M. et al. 2016. Occurrence and risk factors for Toxoplasma gondii and Neospora caninum in sheep of the Guarapuava region, Paraná, Brazil. Brazilian Journal of Veterinary Research and Animal Science. 53, 2 (Jul. 2016), 177–181. DOI:https://doi.org/10.11606/issn.1678-4456.v53i2p177-181.