Gheller, J. M., Carniel, R., Carrasco, A. O. de T. and Seki, M. C. (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), pp. 177-181. doi: 10.11606/issn.1678-4456.v53i2p177-181.