@article{Vikström2011,
author = {Vikström, J. and Bladh, M. and Hammar, M. and Marcusson, J. and Wressle, E. and Sydsjö, G.},
title= {The influences of childlessness on the psychological well-being and social network of the oldest old},
year = {2011},
doi = {10.1186/1471-2318-11-78},
volume = {11},
number = {1},
pages = {78},
}