1. Mueller, J.: Physiologie des Gesichtsines. Leipzig, 1826, p. 207–217; Elements of Physiology, Vol. II, English Translation by W. Baly Taylor and Walton, London, 1842, 1147.
2. Allen, M. J.: An investigation of the time characteristics of accommodation and convergence of the eyes. Ph.D. Thesis, Ohio State Univ., 1949.
3. An objective high speed photographic technique for simultaneously recording changes in accommodation and convergence;Allen;Am. J. Optometry,1949
4. The stimulus to accommodation;Allen;Am. J. Optometry,1955
5. Development of electro-oculography: Standing potential of the eye in registration of eye movements;Marg;Arch. Ophth.,1951