@article{ref1,
title="Normative Constraints on Hostility between States",
journal="Journal of peace research",
year="1986",
author="Singer, J. David",
volume="23",
number="3",
pages="209-211",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0022-3433",
doi="10.1177/002234338602300301",
url="http://dx.doi.org/10.1177/002234338602300301"
}