@inbook{Mellens1999,
author = {Mellens, M.},
title= {Determinants of Demographic Behaviour},
year = {1999},
editor = {de Beer, J.},
editor = {van Wissen, L.},
booktitle = {Europe: One continent, Different Worlds. Population scenarios for the 21st century},
address = {Dordrecht},
publisher = {Kluwer Academic Publishers},
}