J. S. Freeman

The accuracy and precision of timing of self-paced, repetitive movements in subjects with Parkinson's disease.

F. W. Cody, D. O'Boyle, J. Freeman, 1996, Brain : a journal of neurology.

The influence of external timing cues upon the rhythm of voluntary movements in Parkinson's disease.

W. Schady, F. W. Cody, J. Freeman, 1993, Journal of neurology, neurosurgery, and psychiatry.