1. Björk, A., and E. Kugelberg: The electrical activity of the muscles of the eye and eyelids in various functions and during movement. Electroenceph. clin. Neurophysiol. 5, 595–602 (1953).
2. Coermann, R. R.: Untersuchungen über die Einwirkung von Schwingungen auf den menschlichen Organismus. Jb. Dtsch. Luftfahrtforsch. 3, 111–142 (1938).
3. Davson, H.: The eye. New York: Academic Press 1962.
4. Fender, D. H.: Techniques of systems-analysis applied to feedback pathways in the control of eye movements: Homeostasis and feedback mechanisms: S.E.B. Symposium 1964.18.
5. Hill, A. V.: The heat of shortening and the dynamic constants of muscle. Proc. roy. Soc. B. 126, 136–195 (1938).