1. Morson B C, Dawson I MP. Gastrointestinal pathology.2 ed. Blackwell, Oxford 1979; 607–647
2. The radiographic features of small colon cancers.
3. Dodds W J, Stewart ET. Alimentary tract radiology3 ed., A R Margulis, HJ Burhenne. St. Louis, Mosby 1983; Vol. 1: 1160–1189, chapt. 42