@article{ref1,
title="Colour vision and traffic lights",
journal="Schweizerische Rundschau fur Medizin Praxis",
year="1976",
author="Meyer, P.",
volume="65",
number="37",
pages="1123-1129",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="1013-2058",
doi="",
url="http://dx.doi.org/"
}