@article{Guinnane1994,
author = {Guinnane, T. and Okun, B. and Trussell, J.},
title= {What do we know about the timing of fertility transitions in Europe?},
year = {1994},
doi = {10.2307/2061905},
journal = {Demography},
volume = {31},
number = {1},
pages = {1--20},
}