Mohammad, Gul, Rehman Ghani, and Ghulam Nabi. “ACHALASIA OF THE CARDIA”. Journal of Ayub Medical College Abbottabad 5, no. 2 (July 12, 1992): 38–40. Accessed March 14, 2025. https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/4732.