@article{ref1,
title="Disordered sleep, daytime vigilance, and attention deficit hyperactivity disorder",
journal="Journal of pediatrics",
year="1991",
author="",
volume="118",
number="3",
pages="489-490",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-3476",
doi="",
url="http://dx.doi.org/"
}