@article{ref1,
title="One Billion Candela Beacon for the Air Traffic",
journal="Zeitschrift des Vereines Deutscher Ingenieure",
year="1922",
author="No Author(s) Listed, ",
volume="66",
number="",
pages="287-287",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0341-7255",
doi="",
url="http://dx.doi.org/"
}