@article{ref1,
title="Contrast in night vision",
journal="Vision research",
year="1973",
author="Fiorentini, Alessio and Maffei, L.",
volume="13",
number="1",
pages="73-80",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0042-6989",
doi="",
url="http://dx.doi.org/"
}