@article{ref1,
title="Effect of caffeine on cognitive function and psychophysiological status in man",
journal="Fiziologiia Cheloveka",
year="2002",
author="Shapkin, S. A.",
volume="28",
number="1",
pages="144-150",
abstract="<p>[Abstract unavailable]</p><p>Language: ru</p>",
language="ru",
issn="0131-1646",
doi="",
url="http://dx.doi.org/"
}