@article{ref1,
title="Rational approach to colour vision testing",
journal="Aerospace medicine",
year="1967",
author="Cameron, R. E.",
volume="38",
number="1",
pages="51-59",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}