@article{ref1,
title="Recreation for the aged",
journal="Journal of gerontology",
year="1949",
author="Schulze, O.",
volume="4",
number="4",
pages="310-313",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0022-1422",
doi="",
url="http://dx.doi.org/"
}