Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Gottfried Müller and Steffen Weisbrod and Fritz Klingberg,Finger Tapping Frequency and Accuracy Are Decreased in Early Stage Primary Degenerative Dementia,Dementia and Geriatric Cognitive Disorders,1420-8008,S. Karger AG,1991,2,3,169-172,https://cir.nii.ac.jp/crid/1363670318415186048,https://doi.org/10.1159/000107192