@article{ref1,
title="The urban complex",
journal="Sociological review, The",
year="1920",
author="Groves., Ernest R.",
volume="a12",
number="2",
pages="73-81",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0038-0261",
doi="10.1111/j.1467-954X.1920.tb02221.x",
url="http://dx.doi.org/10.1111/j.1467-954X.1920.tb02221.x"
}