1. Bree, R. L., Reuter, S. R.: Angiographic demonstration of a bleeding Meckel's diverticulum. Radiology108, 287 (1973)
2. Cullen, T. S.: Embryology, anatomy and diseases of the umbilicus, together with diseases of the urachus. Philadelphia: W. B. Saunders Company 1916
3. Duszynsky, D. O., Jewett, T. C., Allen, J. E.: Tc 99m Na Pertechnetate scanning of the abdomen with particular reference to small bowel pathology. Am. J. Roentgenol. Radium Ther. Nucl. Med.113, 258 (1971)
4. Gray, S. W., Skandalakis, J. E.: Embryology for Surgeons, pp. 156?167 and 525?529. Philadelphia: W. B. Saunders Company (Ed.) 1972
5. Grosfeld, J. L., Franken, E. A.: Intestinal obstruction in the neonate due to vitelline duct cysts. Surg. Gynecol. Obstet.138, 527 (1974)