@article{ref1,
title="Characteristics of successful pilots",
journal="Journal of aviation medicine",
year="1957",
author="Kubala, A. L. and Trites, D. K.",
volume="28",
number="1",
pages="34-40",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}