1. Glaser JS:Neuro-ophthalmology.Hagerstown, NY, Harper and Row, 1978, pp. 208–209, 265–280.
2. Miller NR (ed):Walsh and Hoyt's Clinical Neuro-Ophthalmology, 4th ed. Baltimore, Williams and Wilkins, 1989, pp. 813, 843–847.
3. Burde RM, Savino PJ, Trobe JD:Clinical Decisions in Neuro-Ophthalmology, 2nd ed. St. Louis, CV Mosby Co, 1992, pp. 215, 217–219, 243–246.