@article{ref1,
title="Accidents at work",
journal="Salud publica de Mexico",
year="1972",
author="Olivares Urbina, C.",
volume="14",
number="5",
pages="719-731",
abstract="<p>[Abstract unavailable]</p> <p>Language: es</p>",
language="es",
issn="0036-3634",
doi="",
url="http://dx.doi.org/"
}