Edelstyn, N., Shepherd, T. A., Mayes, A. R., Sherman, S. M., & Ellis, S. J. (2010). Effect of disease severity and dopaminergic medication on recollection and familiarity in patients with idiopathic nondementing Parkinson's. Neuropsychologia, 48(5), 931 -938. https://doi.org/10.1016/j.neuropsychologia.2009.12.039