@article{ref1,
title="The search for more productive road freight vehicles",
journal="Transportation planning and technology",
year="1989",
author="Ogden, K. W.",
volume="14",
number="2",
pages="89-91",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0308-1060",
doi="10.1080/03081068908717416",
url="http://dx.doi.org/10.1080/03081068908717416"
}