@article{ref1,
title="Concussion of the brain",
journal="La Semana Médica",
year="1960",
author="Di matteo, T. B.",
volume="117",
number="",
pages="884-888",
abstract="<p>[Abstract unavailable]</p><p>Language: es</p>",
language="es",
issn="0370-9590",
doi="",
url="http://dx.doi.org/"
}