1. Valsalva, Antonius M.: Quoted by Lerche.
2. A Study of the Arrangement of the Muscular Fibers at the Upper End of the Esophagus;Birmingham;Jour. Anat. and Physiol.,1899
3. The Arrangement of the Longitudinal and Circular Musculature of the Upper End of the Esophagus;Abel;Jour. Anat. and Physiol.,1913