BOONSOMJINT, W.; MANEERATTANAPORN, M.; CHAROENSAK, A. Correlation between Timed Barium Esophagogram and the Eckardt Stage in Achalasia. Siriraj Medical Journal, [S. l.], v. 70, n. 1, p. 60–65, 2018. Disponível em: https://he02.tci-thaijo.org/index.php/sirirajmedj/article/view/114905. Acesso em: 28 mar. 2024.