Manissadjian, Antranik, et al. “The Total Human Serum Complement in Acute Glomerulonephritis and in Nephrotic and Schönlein-Henoch Syndromes”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 13, no. 3, June 1971, pp. 194-01, https://revistas.usp.br/rimtsp/article/view/199195.