8Caviness JN, Driver-Dunckley E, Connor DJ, et al. Defining mild cognitive impairment in Parkinson's disease [J]. Mov Disord, 2007,22(9) :1272.
9Costa A,Peppe A,Dell' Agnello G, et al. Dopamine and cognitive functioning in de novo subjects with Parkinson' s disease: effects of pramipexole and pergolide on working memory [ J ]. N europsychologia,2009,47 ( 5 ) : 1 374.
10Mamikonyan E, Moberg PJ, Siderowf A, et al. Mild cog- nitive impairment is common in Parkinson' s disease patients with normal Mini-Mental State Examination (MMSE) scores[J], Parkinsonism Relat Disord,2009,15 (3) :226.