@article{Avlund2004,
author = {Avlund, K. and Lund, R. and Holstein, B.E. and Due, P. and Sakari-Rantala, R. and Heikkinen, R.L.},
title= {The impact of structural and functional characteristics of social relations as determinants of functional decline},
year = {2004},
journal = {Journals of Gerontology Series B: Psychological Sciences and Social Sciences},
volume = {59B},
number = {1},
pages = {S44--S51},
}