@article{ref1,
title="The effect of vicarious reinforement on imitation in two social-racial groups",
journal="Child development",
year="1969",
author="Thelen, M. H. and Soltz, W.",
volume="40",
number="3",
pages="879-887",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-3920",
doi="",
url="http://dx.doi.org/"
}