1. Movements of the eyes;von Helmholtz,1910
2. Leigh RJ, Zee DS. The neurology of eye movements. Philadelphia: FA Davis Company; 1991:3–14, 180–190.
3. Movements of the eyes;Alpern,1969
4. Eye-centering the basic oculomotor reflex;Jampel;Curr Eye Res,1996
5. Influence of fixation on the visual acuity;Adler;Arch Ophthalmol,1934