Figueiredo, Luiz Tadeu Moraes, et al. “ A Serological Survey for Antibodies to Piry Arbovirus in Ribeirão Preto Region, São Paulo States, Brazil ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 27, no. 3, June 1985, pp. 157-61, https://revistas.usp.br/rimtsp/article/view/87375.