Ribeiro Netto, A., et al. “Q Fever Study in São Paulo, Brasil. IV – Follow up of Non-Reacting Cattle in Infected Herds”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 8, no. 4, Aug. 1966, pp. 157-61, https://www.revistas.usp.br/rimtsp/article/view/201930.