References
- Cheli R. Advances in gastrointestinal endoscopy. Piccin, Padua 1967; 445–447
- Cheli R, Koch H, Mafatka Z, Percic V, Shiner M. Gut 1969; 10: 962
- Kocianova J, Mařatka Z, Kudrmann J, Vesin S. Gastroenterol 1970; 7: 418–424
- Giacosa A. Clin Lab (Rome) 1977; 1: 271–273
- Giacosa A, Molinari F, Cheli R. Acta Endoscopies 1979; 9: 105–110
- Holmes G KT, Asquith P, Stokes L P, Cooke W T. Gut 1974; 15: 278–282