@article{ref1,
title="Old age and air travel",
journal="Cahiers de Médecine, Les",
year="1974",
author="Perin, M.",
volume="15",
number="11",
pages="707-710",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0010-0978",
doi="",
url="http://dx.doi.org/"
}