@article{ref1,
title="Observations on the vicissitudes of aggression in two siblings",
journal="Journal of autism and childhood schizophrenia",
year="1971",
author="Campbell, Mark and Hersh, S. P.",
volume="1",
number="4",
pages="398-410",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0021-9185",
doi="",
url="http://dx.doi.org/"
}