@article{Constant2002,
author = {Constant, A. and Massey, D.S.},
title= {Return Migration by German Guestworkers: Neoclassical versus New Economic Theories},
year = {2002},
doi = {10.1111/1468-2435.00204},
journal = {International Migration},
volume = {40},
number = {4},
pages = {5--38},
}