@article{ref1,
title="Delays in the Flow of Air Traffic",
journal="Operational research quarterly (1950)",
year="1950",
author="Bowen, E. G. and Pearcy, T.",
volume="1",
number="2",
pages="24-24",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1473-284X",
doi="",
url="http://dx.doi.org/"
}