@article{ref1,
title="Undocumented migration in Africa: trends and policies",
journal="International migration",
year="1983",
author="Adepoju, J.",
volume="21",
number="2",
pages="204-217",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0020-7985",
doi="",
url="http://dx.doi.org/"
}