@article{Dykstra1993,
author = {Dykstra, P.A.},
title= {The differential availability of relationships and the provision and effectiveness of support to older adults},
year = {1993},
doi = {10.1177/0265407593103004},
journal = {Journal of Social and Personal Relationships},
volume = {10},
number = {3},
pages = {355--370},
}