1. Gastrointestinal manifestations of Chagas' disease;De Oliveira;Am J Gastroenterol,1998
2. Dittmar K, Jansen AM, Araujo A, et al. Molecular diagnosis of prehistoric Trypanosoma cruzi in the Texas-Coahuila border region. 13th Annual Meeting of the Paleopathology Association, 2003, Tempe, Arizona. Supplement of the Paleopatho News. Detroit, EUA: Paleopathology Association:4-4.
3. American Trypanosomiasis (Chagas' disease);Kirchhoff,2006