1. Andersson, O. and Grillner, S. (1981). Peripheral control of the cat’s step cycle. I. Phase dependent effects of ramp-movement s of the hip during “fictive locomotion”. Acta Physiol. Scand., 113, 89–101.
2. Andersson, O. and Grillner, S. (1983). Peripheral control of the cat’s step cycle. II. Entrainment of the central pattern generators for locomotion by sinusoidal hip movements during “fictive locomotion”. Acta Physiol. Scand., 118, 229–239.
3. Barnes, W.J.P. (1977). Proprioceptive influences on motor output during walking in the crayfish. J. Physiol. 73, 543–564.
4. Duysens, J. and Pearson, K.G. (1980). Inhibition of flexor burst generation by loading ankle extensor muscles in walking cats. Brain Res., 187, 321–332.
5. Forssberg, H. , Grillner, S. and Rossignol, S. (1977). Phasic gain control of reflexes from the dorsum of the paw during spinal locomotion. Brain Res., 132, 121–139.