1. Why does the efficacy of antiparkinsonian treatment seem to decline in the course of Parkinson's disease?;Agid;Parkinson Report,1993
2. Disturbance of posture in patients with Parkinson's disease;Allum,1988
3. The effect of visual cues on the gait of independently mobile Parkinson's patients;Bagley;Physiotherapy,1991
4. Postural adjustments associated with rapid voluntary arm movements in patients with Parkinson's disease;Bazalgette;Adv Neurol,1986
5. Impaired scaling of long latency postural reflexes in patients with Parkinson's disease;Beckley;Electroencephalogr Clin Neurophysiol,1993