Naher, Begum, Chowdhury Kawser, Ruhul Amin, and SM Ishaq. “Gastric Trichobezoar With Outlet Obstruction in a Child of 4 Years Old - A Rare Occurrence”. Bangladesh Journal of Child Health 34, no. 1 (1): 25-27. Accessed August 10, 2020. https://www.banglajol.info/index.php/BJCH/article/view/5699.