1. Mental changes in Parkinsonism;Pearce, J.M.S.;Br Med J,1974
2. Psychiatric disturbances in Parkinson's disease;Celesia, G.G.; Wanamaker, W.M.;Dis Nerv Sys,1972
3. Dementia in Parkinson's disease: a neuropsychological analysis;Pirozzolo, F.J.; Hansch, E.C.; Mortimer, J.A.; Webster, D.D.; Kuskowski, M.A.;Brain and Cognition,1982
4. Depression and dementia in Parkinson's disease;Mayeux, R.,1982
5. Intellectual and cognitive function in Parkinson's disease;Reitan, R.M.; Boll, T.J.;J Consult Clin Psychol,1971