@article{ref1,
title="Adding Traction to Slippery Bituminous Road Surfaces",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1939",
author="Grossjohann, C",
volume="83",
number="",
pages="286-287",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}