@article{ref1,
title="Four cases of carbon monoxide poisoning in one family",
journal="South Dakota journal of medicine",
year="1968",
author="Watson, E. S.",
volume="21",
number="9",
pages="15-18",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0038-3317",
doi="",
url="http://dx.doi.org/"
}