@article{Goldstein2009,
author = {Goldstein, J.R. and Sobotka, T. and Jasilioniene, A.},
title= {Tempo effects, postponement transitions, and the duration of lowest-low fertility},
year = {2009},
doi = {10.1111/j.1728-4457.2009.00304.x},
journal = {Population and Development Review},
volume = {35},
number = {4},
pages = {663--699},
}