@article{ref1,
title="Guidelines to management of some respiratory problems",
journal="Clinical anesthesia",
year="1968",
author="Ahlgren, E. W.",
volume="3",
number="",
pages="198-209",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0009-9112",
doi="",
url="http://dx.doi.org/"
}