Working memory in Parkinson's disease: the effects of depression and side of onset of motor symptoms
Neuropsychology (2013) - Comment
pubmed: 23688212  doi: 10.1037/a0032265  issn: 1931-1559  issn: 0894-4105 

Paul S. Foster, Raegan C. Yung, Valeria Drago, Gregory P. Crucian, Kenneth M. Heilman