Carvalho, L. et al. 1996. Prevalence of serie bovine leukosis virus antibodies in dairy cattle (Holstein) and beef cattle (Zebu/nelore) in Londrina, State of Paraná. Semina: Ciências Agrárias. 17, 1 (Jan. 1996), 53–57. DOI:https://doi.org/10.5433/1679-0359.1996v17n1p53.