@article{ref1,
title="Grouping of semen in cases of rape",
journal="Fertility and sterility",
year="1961",
author="Helpern, M. and Wiener, A. S.",
volume="12",
number="",
pages="551-553",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0015-0282",
doi="",
url="http://dx.doi.org/"
}