Snak, Alessandra, et al. “Prevalence Study on Trypanosoma Vivax in Dairy Cattle in the Western Region on the State of Paraná, Brazil”. Semina: Ciências Agrárias, vol. 39, no. 1, Feb. 2018, pp. 425-30, doi:10.5433/1679-0359.2018v39n1p425.