1. Donders FC: Beitrag zur lehre von den bewegungen des menschlichen auges. [translation: The movements of the human eye] Holländ Beitr Anat Physiol Wiss. 1848, 1:104-145.
2. von Helmholtz H: Handbuch der Physiologischen Optik [Treatise of optical physiology], vol 3, edn 1. Hamburg: Voss; 1867. Treatise on Physiological Optics (English Translation), vol 3. Translated by JPC Southall. Rochester: Optical Society of America; 1925:44-51.
3. Geometric relations of eye position and velocity vectors during saccades;Tweed;Vision Res.,1990
4. Implications of rotational kinematics for the oculomotor system in three dimensions;Tweed;J. Neurophysiol.,1987
5. Chameleon eye position obeys Listing’s law;Sandor;Vision Res.,2001