@article{ref1,
title="Relative value of various etiological factors in short lasting, adverse psychological reactions to cannabis smoking",
journal="British journal of addiction to alcohol and other drugs",
year="1973",
author="Negrete, J. C.",
volume="68",
number="3",
pages="221-229",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0007-0890",
doi="",
url="http://dx.doi.org/"
}