@inbook{Goldstein2009,
author = {Goldstein, J.R.},
title= {How populations age},
year = {2009},
doi = {10.1007/978-1-4020-8356-3_1},
URL = {http://dx.doi.org/10.1007/978-1-4020-8356-3_1},
editor = {Uhlenberg, Peter},
booktitle = {International handbook of population aging},
address = {Dordrecht},
publisher = {Springer Netherlands},
pages = {7--18},
}