@article{ref1,
title="Ethical limits to the maintenance of life",
journal="AMB, Revista da Associação Médica Brasileira",
year="1976",
author="Becker, J. A.",
volume="22",
number="1",
pages="33-34",
abstract="<p>[Abstract unavailable]</p><p>Language: pt</p>",
language="pt",
issn="0102-843X",
doi="",
url="http://dx.doi.org/"
}