1. 1. Samad A, Whanzada TW, Shoukat I. Gastric outlet obstruction: change in etiology. Pak J Surg 2007;23(1):29-32.
2. Malignant gastric outlet obstruction: bridging another divide;Tendler;Am J Gastroenterol,2002
3. 3. Kotisso R. Gastric outlet obstruction in Northwestern Ethiopia. East Centre Afr J Surg 2000;5:25-9.
4. 4. Shone DN, Nikoomanesh P, Smith-Meek MM, et al. Malignancy is the most common cause of gastric outlet obstruction in the era of H2 blockers. Am J Gastroenterol 1995;90(10):1769-70.
5. Gastric outlet obstruction due to duodenal bezoar: a case report;Guner;Int J Surg Case Rep,2012