@article{ref1,
title="Osteoporosis risk factors in perimenopausal women",
journal="Calcified tissue international",
year="1991",
author="Honkanen, R. and Alhava, E. M. and Saarikoski, S. and Tuppurainen, M.",
volume="49",
number="Suppl",
pages="S74-S75",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0171-967X",
doi="",
url="http://dx.doi.org/"
}