Siqueira, M. ., Esteves, M. B. ., Freire, P. M. ., & Bier, O. G. . (1968). Quantitative studies of complement fixation. II – Relative potencies in complement fixation as established in statistically controlled assays. Revista Do Instituto De Medicina Tropical De São Paulo, 10(4), 209-213. https://revistas.usp.br/rimtsp/article/view/201672