1. Nelson, W.E. , Vaughan, V.C. and McKay, R.J.: Textbook of Pediatrics. 9th ed. Philadelphia, W. B. Saunders Co., p. 773, 1969.
2. Gellis, S.S. and Kagan, B.M.: Current Pediatric Therapy. 4th ed. Philadelphia, W. B. Saunders Co., p. 338, 1970.
3. Palmer, E.D. : Clinical Gastroentology. 2nd ed. New York, Hoeber Med. Div. Harper and Row, pp. 461-466, 1963.
4. Coins in the Esophagus: A Departure from Conventional Therapy
5. The use of a Foley catheter for removal of blunt foreign bodies from the esophagus