1. 1999. Grants atlas of anatomy. 10th Ed. Philadelphia: Lippincott Williams and Wilkins. p 704
2. 1966. Morris' human anatomy. 11th Ed. New York: McGraw-Hill. p 1047
3. 1838. Icones nervorum capitis. Heidelberg.
4. 1999. Gray's anatomy. 38th Ed. New York: Churchill Livingstone. p 1255
5. The anatomy o;Bell,1809