@article{Ha2005,
author = {Ha, J.-H. and Carr, D.},
title= {The effect of parent-child geographic proximity on widowed parents' psychological adjustment and social integration},
year = {2005},
doi = {10.1177/0164027505277977},
journal = {Research on Aging},
volume = {27},
number = {5},
pages = {578--610},
}