@article{ref1,
title="The effects of hypnotic drugs on performance",
journal="Current therapeutic research, clinical and experimental",
year="1973",
author="Bixler, E. O. and Kales, A. and Tan, T. L. and Kales, J. D.",
volume="15",
number="1",
pages="13-24",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0011-393X",
doi="",
url="http://dx.doi.org/"
}