@article{ref1,
title="The acute effects of codeine on human aggressive and non-aggressive behavior",
journal="NIDA research monograph",
year="1989",
author="Spiga, R. and Cherek, D. R. and Roache, John D. and Cowan, K.",
volume="95",
number="",
pages="479-480",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1046-9516",
doi="",
url="http://dx.doi.org/"
}