@article{ref1,
title="The seriousness of child's play",
journal="Harvard Mental Health Letter",
year="1998",
author="Warren, S. L. and Oppenheim, D. and Emde, R. N.",
volume="14",
number="10",
pages="6-6",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1057-5022",
doi="",
url="http://dx.doi.org/"
}