@article{Zientara2011,
author = {Zientara, Piotr},
title= {International migration: A case against building ever higher fences},
year = {2011},
doi = {10.1111/j.1468-0270.2010.02052.x},
journal = {Economic Affairs},
volume = {31},
number = {1},
pages = {66--72},
}