@article{Wachter1997,
author = {Wachter, K.W.},
title= {Kinship resources for the elderly},
year = {1997},
doi = {10.1098/rstb.1997.0166},
journal = {Philosphical Transactions of the Royal Society of London. Series B Biological Sciences},
volume = {352},
number = {1363},
pages = {1811--1817},
}