@article{Balbo2011,
author = {Balbo, N. and Billari, F.C. and Mills, M.},
title= {Fertility in advanced societies: A review of research},
year = {2011},
doi = {10.1007/s10680-012-9277-y},
journal = {European Journal of Population},
volume = {29},
number = {1},
pages = {1--38},
}