@article{ref1,
title="The life expectancy of career flyers",
journal="Journal of aviation medicine",
year="1949",
author="Rafferty, J. A. and Cutler, S. J.",
volume="20",
number="5",
pages="360-364",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}