@article{ref1,
title="Aircraft accidents as related to pilot age and experience",
journal="Journal of aviation medicine",
year="1957",
author="Zeller, A. F. and Moseley, H. G.",
volume="28",
number="2",
pages="171-179",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0095-991X",
doi="",
url="http://dx.doi.org/"
}