@article{ref1,
title="Flight safety in VTOL aircraft",
journal="Annals of the New York Academy of Sciences",
year="1963",
author="Schmidt, Carl F.",
volume="107",
number="1",
pages="49-56",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-8923",
doi="10.1111/j.1749-6632.1963.tb13270.x",
url="http://dx.doi.org/10.1111/j.1749-6632.1963.tb13270.x"
}