@article{ref1,
title="Drive and performance modification following multiple (light-light) shifts in the photoperiod",
journal="Aerospace medicine",
year="1973",
author="Rohles, Frederick H. and Ptacek, C. H.",
volume="44",
number="2",
pages="135-139",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}