1. Cricopharyngeus muscle;Batson;Ann. Otol.,1955
2. Deglutition: Pharyngeal stage;Bosma;Physiol. Rev.,1957
3. The upper pharynx;Bosma;Ann. Otol.,1961
4. The upper pharynx;Bosma;Ann. Otol.,1962
5. A radiological study of deglutition;Johnstone;J. Anat.,1942