@article{ref1,
title="Determinants of active commuting",
journal="Preventive medicine",
year="2008",
author="Kayser, B.",
volume="46",
number="1",
pages="8-8",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0091-7435",
doi="10.1016/j.ypmed.2007.08.016",
url="http://dx.doi.org/10.1016/j.ypmed.2007.08.016"
}