@article{ref1,
title="Clinical observations on the spine in ejected pilots",
journal="Acta orthopaedica Scandinavica",
year="1961",
author="Hirsch, C. and Nachemson, A.",
volume="31",
number="",
pages="135-145",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-6470",
doi="",
url="http://dx.doi.org/"
}