@article{ref1,
title="Children at play",
journal="Kango gijutsu",
year="1979",
author="Hasegawa, H.",
volume="25",
number="12",
pages="147-155",
abstract="<p>[Abstract unavailable]</p><p>Language: ja</p>",
language="ja",
issn="0449-752X",
doi="",
url="http://dx.doi.org/"
}