@article{ref1,
title="Keeping the peace or peace of mind? Maternal cognitions about sibling conflict and aggression",
journal="New directions for child and adolescent development",
year="1999",
author="Piotrowski, C. C.",
volume="",
number="86",
pages="5-23",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="1520-3247",
doi="",
url="http://dx.doi.org/"
}