1. Lectures on diseases of the nervous system;Charcot JM.,1877
2. Primary sensory symptoms in parkinsonism;Snider SR;Neurology,1976
3. Pain in Parkinson's disease;Ford B;Clin Neurosci,1998
4. Pain in Parkinson's disease;Goetz CG;Mov Disord,1986
5. Painful Parkinson's disease;Quinn NP;Lancet,1986