Marana, Elizabete Regina Marangoni, et al. “Occurrence of Antibodies Anti-Toxoplasma Gondii in Dairy Cattle in the North of Paraná - Brazil”. Semina: Ciências Agrárias, vol. 16, no. 1, Jan. 1995, pp. 40-42, doi:10.5433/1679-0359.1995v16n1p40.