@article{ref1,
title="Access to safe parks helps increase physical activity among teenagers",
journal="Policy brief: UCLA Center for Health Policy Research",
year="2005",
author="Babey, Susan H. and Brown, E. Richard and Hastert, Theresa A.",
volume="",
number="PB2005-10",
pages="1-6",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="",
doi="",
url="http://dx.doi.org/"
}