Role of the basal ganglia in category learning: how do patients with Parkinson's disease learn?
Behavioral Neuroscience (2004) - Comment
pubmed: 15301595  doi: 10.1037/0735-7044.118.4.676  issn: 0735-7044  issn: 1939-0084 

D. Shohamy, C. E. Myers, S. Onlaor, M. A. Gluck