@article{ref1,
title="The biological effects of carbon monoxide on the pregnant woman, fetus, and newborn infant",
journal="American journal of obstetrics and gynecology",
year="1977",
author="Longo, L. D.",
volume="129",
number="1",
pages="69-103",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0002-9378",
doi="",
url="http://dx.doi.org/"
}