@article{ref1,
title="Atmospheric concentrations of nitrous oxide in ambulances during Entonox administration",
journal="Anaesthesia and intensive care",
year="1989",
author="Ilsley, A. H. and Plummer, J. L. and Cousins, M. J. and Fronsko, R. L. and Gilligan, J. E.",
volume="17",
number="1",
pages="83-85",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0310-057X",
doi="",
url="http://dx.doi.org/"
}