@article{ref1,
title="Sleep pattern development from 6 through 33 months",
journal="Journal of pediatric psychology",
year="1980",
author="Jacklin, C. N. and Snow, M. E. and Gahart, M. and Maccoby, E. E.",
volume="5",
number="3",
pages="295-303",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0146-8693",
doi="",
url="http://dx.doi.org/"
}