@article{ref1,
title="Circadian clocks optimally adapt to sunlight for reliable synchronization",
journal="Journal of the Royal Society, Interface",
year="2015",
author="Hasegawa, Yoshihiko and Arita, Masanori",
volume="12",
number="107",
pages="2015.0374-2015.0374",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1742-5689",
doi="10.1098/rsif.2015.0374",
url="http://dx.doi.org/10.1098/rsif.2015.0374"
}