REFERENCES
- Code, C. F., Creamer, B. and Schlecel, J. R.: An Atlas of Esophageal Motility in Health and Disease. Springfield, Illinois, Charles C Thomas, 1958.
- Wolf, B. S., Marshak, R. H., Som, M. L., Brahms, S. A. and Greenberg, E. I.: The gastro-esophageal vestibule on roentgen examination. J. Mt. Sinai Hosp. 25: 167, 1958.
- Jacobs, W. H.: Symptomatic hiatus hernia. J. Mt. Sinai Hosp. 26: 464, 1959.
- Bockus, H. L.: Gastroenterology. Ed. 2. Philadelphia, W. B. Saunders Company, 1963, vol. 1, p. 241.