@inbook{Bauer1998,
author = {Bauer, T. and Zimmermann, K.},
title= {Causes of international migration: A survey},
year = {1998},
editor = {Gorter, C.},
editor = {Nijkamp, P.},
editor = {Poot, J.},
booktitle = {Crossing borders: Regional and urban perspectives on international migration},
address = {Aldershot},
publisher = {Ashgate},
pages = {95--127},
}