1. Friedland DR:Development of Upper Respiratory Tract Motor Nuclei in the Rat (Rattus norvegicus). Ph.D. Dissertation, City University of New York. Ann Arbor, MI: University Microfilms, 1993
2. Crelin ES: Development of the upper respiratory system.Ciba Clin Symp 28(3):3?26, 1976
3. Laitman JT:The Ontogenetic and Phylogenetic Development of the Upper Respiratory System and Basicranium in Man. Ph.D. Dissertation, Yale University. Ann Arbor, MI: University Microfilms, 1977
4. Howes GB: Additional observations upon the intranarial epiglottis.J Anat Physiol 23:587?597, 1889
5. Negus VE:The Comparative Anatomy and Physiology of the Larynx. New York: Grune and Stratton, 1949