Abbas, Amin M, Sami Medani, Tajeldin M Abdallah, and Gasim I Gasim. 2016. “Clinical Utility of Esophageal Manometry in the Patients With Dysphagia – Experience from Sudan”. International Journal of Health Sciences 10 (4). https://pub.qu.edu.sa/index.php/journal/article/view/1208.