Huh, Joon Young, Moo In Park, Seun Ja Park, Won Moon, and Hyung Hun Kim. “Variant Achalasia, the Hole of the Original Classification”. Turkish Journal of Gastroenterology 26, no. 2 (January 2, 2015): 95–98. Accessed January 1, 2026. https://www.turkjgastroenterol.org/index.php/tjg/article/view/2700.