@article{ref1,
title="Sustained pushing and pulling by children",
journal="International journal for consumer safety",
year="1997",
author="de Winter, P. E. and Moes, Niels C.C.M.",
volume="4",
number="2",
pages="79-95",
abstract="Sustained forces exerted by children during 3 seconds on a horizontal bar have been measured. Pushing and pulling with arms when standing and pushing with arms and legs when sitting were recorded. A total of 316 children ranging in age from 4 to 12 years participated in the tests.<p />",
language="",
issn="0929-8347",
doi="",
url="http://dx.doi.org/"
}