@article{ref1,
title="Comparative study of caffeine with other stimulants in university students",
journal="Activitas nervosa superior",
year="1972",
author="Vojtĕchovský, Miloš and Safratová, V.",
volume="14",
number="2",
pages="138-139",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0001-7604",
doi="",
url="http://dx.doi.org/"
}