@article{ref1,
title="Penalty points systems: efficient technique of enforcement and prevention",
journal="Proceedings of the Road Safety on Four Continents Conference",
year="2007",
author="Mikulik, Josef",
volume="14",
number="",
pages="10p-10p",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="",
doi="",
url="http://dx.doi.org/"
}