@article{Avlund2003,
author = {Avlund, K. and Pedersen, A.N. and Schroll, M.},
title= {Functional decline from age 80 to 85: influence of preceding changes in tiredness in daily activities},
year = {2003},
doi = {10.1097/01.PSY.0000082640.61645.BF},
journal = {Psychosomatic Medicine},
volume = {65},
number = {5},
pages = {771--777},
}