Michely, J., Barbe, M. T., Hoffstaedter, F., Timmermann, L., Eickhoff, S. B., Fink, G. R., et al. (2012). Differential effects of dopaminergic medication on basic motor performance and executive functions in Parkinson's disease. Neuropsychologia, 50(10), 2506-2514. doi:10.1016/j.neuropsychologia.2012.06.023.