@article{Fokkema2012,
author = {Fokkema, T. and de Jong-Gierveld, J. and Dykstra, P.A.},
title= {Cross-national differences in older adult loneliness},
year = {2012},
doi = {10.1080/00223980.2011.631612},
journal = {The Journal of Psychology},
volume = {146},
number = {1-2},
pages = {201--228},
}