Pandit N, Shrestha V, Awale L, Jaiswal LS. Unusual achalasic sigmoid esophagus. J. Soc. Surg. Nepal [Internet]. 2019 Dec. 31 [cited 2024 Nov. 21];22(2):35-7. Available from: https://nepjol.info./index.php/JSSN/article/view/28743