1. Embryology and developmental disorders;Arey,1992
2. Adenocarcinoma in tubular duplication of the sigmoid colon;Arkema;Gastrointest Radiol,1977
3. Colonic duplication in an adult;Baro;Eur J Radiol,1988
4. An unusual alimentary duplication;Bedford;Br J Clin Pract,1971
5. Duplication of the colon;Beyer;Report of two cases and review of the literature. Gastrointest Radiol,1981