@article{ref1,
title="The "bang" of supersonic airplanes",
journal="Revista ADM",
year="1968",
author="",
volume="25",
number="4",
pages="341-51 contd",
abstract="<p>[Abstract unavailable]</p><p>Language: es</p>",
language="es",
issn="0001-0944",
doi="",
url="http://dx.doi.org/"
}