1. Miller NR, Newman NJ . Walsh and Hoyt's Clinical Neuro-Ophthalmology, 5th ed. Lippincott Williams & Wilkins: Baltimore, MD, 1999.
2. Daroff RB, Troost BT . Supranuclear disorders of eye movements. In: Duane TD, Jager EA (eds). Clinical Ophthalmology, Vol 2. Harper and Row: Philadelphia, Chapter 10, 1987.
3. Henn V, Lang W, Hepp K, Reisine H . Experimental gaze palsies in monkeys and their relation to human pathology. Brain 1984; 107: 619–636.
4. Leigh RJ, Zee DS . The neurology of eye movement, 3rd ed. Oxford University Press Inc.: New York, NY, 1999.
5. Daroff RB, Hoyt WF . Supranuclear disorders of ocular control system in man: clinical, anatomical and physiological correlations. In: Back-y-Rita P, Collins CC, Hyde JE (eds). The Control of Eye Movements. Academic Press: New York, 1971, pp 175–235.