@article{ref1,
title="Flight at supersonic speeds",
journal="Endeavour",
year="1949",
author="Hooker, S. G.",
volume="8",
number="31",
pages="120-124",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0160-9327",
doi="",
url="http://dx.doi.org/"
}