1. Liu X, Zhou C, Zhang G, Lin Y, Li S. [CT anatomic measurement of the optic canal and its clinical significance]. (2000) Zhonghua er bi yan hou ke za zhi. 35 (4): 275-7.
2. Lloyd GAS: Radiology of the Orbit. Philadelphia: W.B. Saunders, 1975, pp 26-29
3. Maurice M. Reeder M.D. (auth.) - Reeder and Felson’s Gamuts in Radiology comprehensive lists of Roentgen differential diagnosis, Third Edition, 1993, p78
4. Matsuoka S, Nishimura H, Kitamura K, Numaguchi Y. Circular enlargement of the optic canal caused by paranasal sinus mucocele. (1983) Surgical neurology. 19 (6): 544-7.