@inbook{Willekens1984,
author = {Willekens, F.J. and Drewe, P. },
title= {A Multiregional model for regional demographic projection},
year = {1984},
editor = {Ter Heide, H.},
editor = {F. Willekens, F. },
booktitle = {Demographic Research and spatial policy},
address = {London},
publisher = {Academic Press},
pages = {309--334},
}