@article{ref1,
title="Playground safety",
journal="Journal of the royal society of health",
year="1993",
author="Leung, A. K. and Robson, W. L. and Lim, Si Huan and Chopra, Sanjeev",
volume="113",
number="6",
pages="320-323",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0264-0325",
doi="",
url="http://dx.doi.org/"
}