@article{ref1,
title="Modelling Complexity",
journal="OR: Operational research quarterly (1953)",
year="1968",
author="Banbury, John",
volume="19",
number="2",
pages="198-198",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="1473-2858",
doi="",
url="http://dx.doi.org/"
}