Mohammed, M. O. ., B. F. . Salim, and A. A. . Ramadhan. “Esophageal Manometry Among Patients With Dysphagia Referred To Kurdistan Center For Gastroenterology And Hepatology”. AMJ (Advanced Medical Journal) , vol. 1, no. 1, Sept. 2022, pp. 34-42, doi:10.56056/amj.2015.05.