@article{ref1,
title="Movie Ratings and the Content of Adult Videos: The Sex-Violence Ratio",
journal="Journal of communication",
year="1990",
author="Yang, N. and Linz, Daniel",
volume="40",
number="2",
pages="28-42",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0021-9916",
doi="10.1111/j.1460-2466.1990.tb02260.x",
url="http://dx.doi.org/10.1111/j.1460-2466.1990.tb02260.x"
}