PANDIT, N.; SHRESTHA, V.; AWALE, L.; JAISWAL, L. S. Unusual achalasic sigmoid esophagus. Journal of Society of Surgeons of Nepal, [S. l.], v. 22, n. 2, p. 35–37, 2019. DOI: 10.3126/jssn.v22i2.28743. Disponível em: https://nepjol.info/index.php/JSSN/article/view/28743. Acesso em: 27 sep. 2024.