@article{ref1,
title="Relation of time between flights to the accident potential of century series pilots",
journal="Aerospace medicine",
year="1967",
author="Zeller, A. F. and Burke, J. M.",
volume="38",
number="10",
pages="998-1001",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}