@article{ref1,
title="Statistical data on waivers granted to airline flight crew members",
journal="Aerospace medicine",
year="1970",
author="Laverne, J. and Lafontaine, E.",
volume="41",
number="9",
pages="1073-1075",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}