@article{ref1,
title="Beta blockers and depressive syndromes",
journal="Arquivos Brasileiros de Cardiologia",
year="1991",
author="Knijnik, J. and Picon, P. D.",
volume="56",
number="2",
pages="157-159",
abstract="<p>[Abstract unavailable]</p><p>Language: pt</p>",
language="pt",
issn="0066-782X",
doi="",
url="http://dx.doi.org/"
}