@article{ref1,
title="Ophthalmological aspects of the problem of preventing mid-air collisions",
journal="Médecine Aéronautique et Spatiale",
year="1957",
author="Perdriel, G.",
volume="12",
number="4",
pages="339-348",
abstract="<p>[Abstract unavailable]</p> <p>Language: fr</p>",
language="fr",
issn="0294-0817",
doi="",
url="http://dx.doi.org/"
}