@article{ref1,
title="Human color perception and Stiles' pi mechanisms",
journal="Vision research",
year="1977",
author="Estévez, O. and Cavonius, C. R.",
volume="17",
number="3",
pages="417-422",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}