Chatha, Sohail Saqib, Muhammad Qasim Butt, and Adeel Qamar Ghumman. 2014. “GALL STONE ILEUS: A RARE CAUSE OF SMALL BOWEL OBSTRUCTION: Gall Stone Ileus”. Pakistan Armed Forces Medical Journal 64 (4): 639-41. https://pafmj.org/PAFMJ/article/view/2044.