Pandit, N., Shrestha, V., Awale, L. and Jaiswal, L.S. 2019. Unusual achalasic sigmoid esophagus. Journal of Society of Surgeons of Nepal. 22, 2 (Dec. 2019), 35–37. DOI:https://doi.org/10.3126/jssn.v22i2.28743.