@article{ref1,
title="The early development of reactions to peers with controllable and uncontrollable problems",
journal="Journal of pediatric psychology",
year="1987",
author="Sigelman, Carol K. and Begley, N. L.",
volume="12",
number="1",
pages="99-115",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0146-8693",
doi="",
url="http://dx.doi.org/"
}