@article{ref1,
title="An hypothesis to account for a basic distinction between rods and cones",
journal="Vision research",
year="1971",
author="Young, R. W.",
volume="11",
number="1",
pages="1-5",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}