Bittencourt, Achiléa Lisboa, and Helenemarie Schaer Barbosa. “Incidence of Congenital Transmission of Chagas Disease in Abortion Material”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 14, no. 4, Aug. 1972, pp. 257-9, https://revistas.usp.br/rimtsp/article/view/198815.