1. Coghill, G. E., 1929Anatomy And The Problem of BehaviorHafner, New York, pp. 86–87.
2. Bekoff, A., 1981, Embryonic development of the neural circuitry underlying motor coordination, in:Studies in Developmental Neurobiology—Essays in Honor of Viktor HamburgerW. Maxwell Cowan, ed., Oxford University Press, New York, pp. 134–170.
3. Brown, T. G., and Sherrington, C. S., 1912, The rule of reflex response in the limb reflexes of the mammal and its exceptionsJournal of Physiology44, 125–130.
4. Carpenter, C., and Ferguson, G. W., 1977, Variation and evolution of stereotyped behavior in reptiles, in:Biology of the Reptilia, vol. 7, Ecology and BehaviorC. Gans and D. W. Tinkle, eds., Academic Press, New York, pp. 335–403.
5. Cazalets, J. R., Menard, I., Crémieux, J., and Clarac, F., 1990, Variability as a characteristic of immature motor systems: an electromyographic study of swimming in the newborn ratBehavioural Brain Research40, 215–225.