Urtamo, Annele, Satu K. Jyväkorpi, and Timo E. Strandberg. “Definitions of Successful Ageing: A Brief Review of a Multidimensional Concept”. Acta Bio Medica Atenei Parmensis 90, no. 2 (May 23, 2019): 359-363. Accessed March 28, 2020. https://mattioli1885journals.com/index.php/actabiomedica/article/view/8376.