@article{ref1,
title="Premenstrual syndrome: an ancient woe deserving of modern scrutiny",
journal="JAMA journal of the American Medical Association",
year="1981",
author="González, E. R.",
volume="245",
number="14",
pages="1393-1396",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0098-7484",
doi="",
url="http://dx.doi.org/"
}