@article{Zhu2007,
author = {Zhu, H. and Xie, Y.},
title= {Socioeconomic differentials in mortality among the oldest old in China },
year = {2007},
doi = {10.1177/0164027506296758},
journal = {Research on Aging},
volume = {29},
number = {2},
pages = {125--143},
}