1. Cricopharyngeal function and dysfunction;Cook;Dysphagia,1993
2. Opening mechanism of the human upper esophageal sphincter;Cook;Am J Physiol,1989
3. Evaluation and treatment of swallowing disorders;Logemann,1998
4. Management of adult neurogenic dysphagia;Huckabee,1999
5. Dysphagia: clinical management in adults and children;Groher,2009