Santoro, Ferrucio, et al. “Immune Complexes in Schistosomiasis. IV – C₃, C₄ and C1q Characterization and Correlation Between C3 in Serum and Circulating IC Levels”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 19, no. 1, Feb. 1977, pp. 39-42, https://revistas.usp.br/rimtsp/article/view/197767.