Dias, J. C. Pinto, and Kurt Kloetzel. “The Prognostic Value of the Electrocardiographic Features of Chronic CHAGAS’ Disease”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 10, no. 3, June 1968, pp. 158-62, https://revistas.usp.br/rimtsp/article/view/201654.