@article{ref1,
title="Longitudinal study on physical performnce of ten pilots over a ten-year period",
journal="Aerospace medicine",
year="1972",
author="Nunneley, S. A. and Finkelstein, Susan and Luft, U. C.",
volume="43",
number="5",
pages="541-544",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}