@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 Imhoff, E. },
booktitle = {Female Labour Market Behaviour and Fertility: A Rational Approach},
address = {New York},
publisher = {Springer-Verlag},
pages = {11--31},
}