@article{ref1,
title="A Proposed Definition of Operations Research",
journal="Operational research quarterly (1950)",
year="1951",
author="Brown, R. G. and Easterfield, T. E.",
volume="2",
number="2",
pages="21-24",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1473-284X",
doi="",
url="http://dx.doi.org/"
}