@article{ref1,
title="The problem of drug dependency",
journal="Salud publica de Mexico",
year="1972",
author="Pucheu Regis, C. and Campillo Serrano, C.",
volume="14",
number="2",
pages="169-189",
abstract="<p>[Abstract unavailable]</p><p>Language: es</p>",
language="es",
issn="0036-3634",
doi="",
url="http://dx.doi.org/"
}