Βιβλιογραφική Τεκμηρίωση:
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Indian older adults and the digit span A preliminary report.Tripathi R, Kumar K, Bharath S, P M, Rawat VS, Varghese M.Dement Neuropsychol. 2019 Jan-Mar;13(1):111-115.
A retrospective review of digit span-related effort indicators in probable Alzheimer's disease patients.Kiewel NA, Wisdom NM, Bradshaw MR, Pastorek NJ, Strutt AM.Clin Neuropsychol. 2012;26(6):965-74.