@article{ref1,
title="Playing: the child, the adult, the animal",
journal="Nouvelle Presse Medicale",
year="1977",
author="Veylon, R.",
volume="6",
number="1",
pages="51-4,57",
abstract="<p>[Abstract unavailable]</p><p>Language: fr</p>",
language="fr",
issn="0301-1518",
doi="",
url="http://dx.doi.org/"
}