@article{ref1,
title="Sleep episodes in Parkinson's disease: a wake-up call",
journal="Movement disorders",
year="2000",
author="Frucht, S. J. and Greene, P. E. and Fahn, S.",
volume="15",
number="4",
pages="601-603",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0885-3185",
doi="",
url="http://dx.doi.org/"
}