R. A. Kozarek, D. J. Patterson, T. J. Ball, M. G. Gelfand, G. E. Jiranek, J. E. Bredfeldt, J. J. Brandabur, H. W. Wolfsen, S. L. Raltz,
Esophageal dilation can be done safely using selective fluoroscopy and single dilating sessions. Journal of Clinical Gastroenterology. ,vol. 20, pp. 184- 188 ,(1995) ,
10.1097/00004836-199504000-00003