1. Complications of Duodenal Diverticula
2. Edwards GH. Enteroliths of small intestine. J Florida Med Assoc 1931;17:463-466.
3. Grettve S. A contribution to the knowledge of primary true concrements in the small bowel. Acta Chir Scand 1947;95:387-410.
4. Pfahler GE, Stamm CS. Diagnosis of enteroliths by means of roentgen rays. Surg Gynecol Obstet 1915;21:14-17.
5. De Witt WR, Morrissey PG, Failla SD. Obstruction of small intestine from primary calculus. Mil Surgeon 1943;92:34-37.