@article{ref1,
title="Observations on some periodic and nonperiodic phenomena in normal human sleep",
journal="Annals of the New York Academy of Sciences",
year="1962",
author="Shapiro, Arthur",
volume="98",
number="4",
pages="1139-1143",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0077-8923",
doi="10.1111/j.1749-6632.1962.tb30625.x",
url="http://dx.doi.org/10.1111/j.1749-6632.1962.tb30625.x"
}