@article{ref1,
title="Attempted suicide and the menstrual cycle--a negative conclusion",
journal="Journal of psychosomatic research",
year="1974",
author="Birtchnell, J. and Floyd, S.",
volume="18",
number="5",
pages="361-369",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3999",
doi="",
url="http://dx.doi.org/"
}