1. [1] Broderick JT, Mathews JB. Ulcer complications. In: Zinner MJ, Ashley SW. eds. Maingot's abdominal operations. 11th edn. New York: McGraw-Hill 2007: p. 365.
2. [2] Primrose JN. Stomach and duodenum. In: Williams NS, Bulstrode CJK, O'Connell PR. Eds. Bailey & Love's short practice of surgery. 25th edn. London (UK): Arnold Publisher 2008:1045-79.
3. [3] Yeo CJ. Shackelford's Surgery of the alimentary tract. Chapter - 50. 6th edn. Elsevier Publication 2007:717- 32.
4. [4] Spechler SJ. Complication of peptic ulcers. In: Feldman M, Freidman SS, Slesinger MH, et al. eds. Gastrointestinal and liver disease. Vol 1. 9th edn. Philadelphia: WB Saunders 2010:861-8.
5. [5] Ellis H. Pyloric stenosis. In: Nyhus LM, Wastell C. eds. Surgery of the stomach and duodenum. 4th edn. Boston: Little Brown Publications 1986: p. 475.