@article{ref1,
title="Carefully controlled population survey",
journal="Archives of sexual behavior",
year="1993",
author="Muir, J. G.",
volume="22",
number="5",
pages="501-503",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0004-0002",
doi="",
url="http://dx.doi.org/"
}