@inbook{Willekens1991,
author = {Willekens, F.J.},
title= {Understanding the interdependence between parallel careers},
year = {1991},
editor = {Siegers, J.J.},
editor = {de Jong-Gierveld, J. },
editor = {van Imhof, E. },
booktitle = {Female Labour Market Behaviour and Fertility: A Rational-Choice Approach},
address = {Berlin},
publisher = {Springer},
pages = {11--31},
}