@article{ref1,
title="Casual versus heavy use of marijuana: a redefinition of the marijuana problem",
journal="American journal of psychiatry",
year="1971",
author="Mirin, S. M. and Shapiro, L. M. and Meyer, R. E. and Pillard, R. C. and Fisher, S.",
volume="127",
number="9",
pages="1134-1140",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-953X",
doi="",
url="http://dx.doi.org/"
}