@article{Kok2015,
author = {Kok, A.A.L. and Aartsen, M.J. and Deeg, D.J.H. and Huisman, M. },
title= {Capturing the diversity of successful aging: An operational definition based on 16-year trajectories of functioning},
year = {2015},
doi = {10.1093/geront/gnv127},
journal = {The Gerontologist },
volume = {57},
number = {2},
pages = {240--251},
}