Kirchner, E. ., & Cotrim, J. X. . (1972). Immunological response to toxoplasmosis in population groups of the State of São Paulo, Brazil, as evaluated by the distribution of serum titers in the dye-test. Revista Do Instituto De Medicina Tropical De São Paulo, 14(1), 33-50. https://revistas.usp.br/rimtsp/article/view/198751