1. Hill, A. V. 1965. Trails and Trials in Physiology. Arnold, London, p. 374.
2. Sandow, A. 1952. Excitation-contraction coupling in muscular response. Yale J. Biol. Med. 25:176–201.
3. Huxley, A. F. 1971. The activation of striated muscle and its mechanical response. Proc. R. Soc. London Ser. B 178:1–27.
4. Costantin, L. L. 1971. Inward spread of activation in frog skeletal muscle. In: Contractility of Muscle Cells and Related Processes. R. J. Podolsky, ed. Prentice-Hall, Englewood Cliffs, N.J. pp. 89–98.
5. Page, S. G. 1965. A comparison of the fine structures of frog slow and twitch muscle fibers. J. Cell Biol. 26:477–497.