Silva, Marcos Vinicius da, et al. “ Immunodiagnostic of Human Leptospirosis by ELISA-IgM, Employing: Different Antigenic Preparations As from Prevalent Serovars of Leptospira Interrogans ”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 32, no. 4, Aug. 1990, pp. 233-9, https://www.revistas.usp.br/rimtsp/article/view/28739.