Vasconcelos, S. A., I. Ohtsubo, P. H. Yasuda, A. S. Moretti, F. H. Ito, E. de C. Passos, and J. de A. Côrtes. “The Influence of Serum Concentration on the Sensitivity and Specificity of the Microscopic Aglutination Test, Using the L. Biflexa, Buenos Aires Strain, As Antigen for Diagnosing Swine Leptospirosis”. Brazilian Journal of Veterinary Research and Animal Science, vol. 27, no. 1, June 1990, pp. 33-39, doi:10.11606/issn.0000-0000.27133-39.