@article{ref1,
title="Neurophysiological effects of small doses of caffeine in man",
journal="Activitas nervosa superior",
year="1974",
author="Sulc, J. and Brozek, G. and Cmíral, J.",
volume="16",
number="3",
pages="217-218",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-7604",
doi="",
url="http://dx.doi.org/"
}