@article{ref1,
title="Accidents at work and productivity",
journal="Salud publica de Mexico",
year="1963",
author="Mendoza, A.",
volume="14",
number="",
pages="891-893",
abstract="<p>[Abstract unavailable]</p> <p>Language: es</p>",
language="es",
issn="0036-3634",
doi="",
url="http://dx.doi.org/"
}