Pandit, Narendra, Vijay Shrestha, Laligen Awale, and Lokesh Shekher Jaiswal. “Unusual Achalasic Sigmoid Esophagus”. Journal of Society of Surgeons of Nepal 22, no. 2 (December 31, 2019): 35–37. Accessed November 21, 2024. https://nepjol.info./index.php/JSSN/article/view/28743.