@article{ref1,
title="Effect of caffeine on coffee drinking",
journal="Nature",
year="1976",
author="Kozlowski, L. T.",
volume="264",
number="5584",
pages="354-355",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0028-0836",
doi="",
url="http://dx.doi.org/"
}