@article{ref1,
title="A comparison of heuristics for a school bus scheduling problem",
journal="Transportation research part B: methodological",
year="1986",
author="Graham, Derek and Nuttle, Henry L. W.",
volume="20",
number="2",
pages="175-182",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0191-2615",
doi="10.1016/0191-2615(86)90006-8",
url="http://dx.doi.org/10.1016/0191-2615(86)90006-8"
}