Oliveira, J. A. Mello de. “Enzyme Histochemistry of the Duoden Auerbach Plexus in the Acute Phase of Experimental Chagas Disease in Rats”. Revista Do Instituto De Medicina Tropical De São Paulo, vol. 15, no. 5, Oct. 1973, pp. 261-7, https://revistas.usp.br/rimtsp/article/view/200893.