@article{ref1,
title="Referees among most important players in soccer tournaments",
journal="Journal of sport and social issues",
year="2005",
author="Groot, Loek",
volume="29",
number="4",
pages="437-442",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0193-7235",
doi="10.1177/0193723505280797",
url="http://dx.doi.org/10.1177/0193723505280797"
}