@inbook{Chen2009,
author = {Chen, F. and Liu, G.},
title= {Population aging in China},
year = {2009},
doi = {10.1007/978-1-4020-8356-3_8},
editor = {Uhlenberg, P.},
booktitle = {International handbook of population aging},
address = {Berlin},
publisher = {Springer Science+Business Media},
pages = {157‒172},
}