@article{ref1,
title="Child play and its significance",
journal="Deutsche Krankenpflegezeitschrift",
year="1974",
author="Flach, M.",
volume="27",
number="12",
pages="676-679",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0012-074X",
doi="",
url="http://dx.doi.org/"
}