@article{ref1,
title="Geographical patterns of residence and workplace separation",
journal="Transportation research record",
year="1976",
author="Bell, Thomas L.",
volume="617",
number="",
pages="50-54",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0361-1981",
doi="",
url="http://dx.doi.org/"
}