@article{ref1,
title="Pushing and pulling forces exerted by children",
journal="International journal for consumer safety",
year="1994",
author="de Winter, P. E. and Steenbekkers, LPA and Houtkamp, JJ",
volume="1",
number="4",
pages="243-258",
abstract="Abstract unavailable.<p />",
language="",
issn="0929-8347",
doi="",
url="http://dx.doi.org/"
}