Rosen TJ, Growdon JH, Corkin S.: Comparison of rates of progression in Alzheimer's disease and Parkinson's disease. J Neurol Transm (suppl) 1987;24:105-107.
2.
Blessed G., Tomlinson BE, Roth M.: The association between quantitative measures of dementia and of senile changes in the grey matter of elderly subjects. Br J Psychiatry1986;114:797-811.
3.
Cummings JL: Intellectual impairment in Parkinson's disease: Clinical, pathologic, and biochemical correlates. J Geriatr Psychiatry Neurol1988;1:24-36.