@article{ref1,
title="Acute accidental lead poisoning causing occlusive abdominal syndrome; diagnosis made by determination of urinary coproporphyrins",
journal="Revista Brasileira de Cirurgia",
year="1956",
author="Das lacaz, P. S. and Tinoco, Eduardo Muniz Barretto",
volume="32",
number="4",
pages="439-445",
abstract="<p>[Abstract unavailable]</p> <p>Language: pt</p>",
language="pt",
issn="0034-7124",
doi="",
url="http://dx.doi.org/"
}