@article{ref1,
title="Adolescent sleepiness: increased risk in a high-risk population",
journal="Journal of safety research",
year="1990",
author="Carskadon, Mary A.",
volume="21",
number="4",
pages="169-169",
abstract="<p>[Abstract unavailable]</p>",
language="en",
issn="0022-4375",
doi="",
url="http://dx.doi.org/"
}