Tafuri, W. L. .; Maria, T. A. .; Lopes, E. R. . Myenteric Plexus Lesions in the Esophagus, Jejunum, and Colon of Chronic Chagasic Humans. Electron Microscopy Study. Rev. Inst. Med. Trop. São Paulo 1971, 13 (2), 76-91.