@article{ref1,
title="Flying stress in relation to flying proficiency",
journal="AMD technical reports",
year="1964",
author="Duffy, J. C. and Hale, H. B. and Williams, E. W. and ELLIS, J. P. Jr",
volume="1964",
number="",
pages="1-8",
abstract="[Abstract unavailable]  <p>sam-tr-64-88.</p>  <p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}