@article{ref1,
title="Cave diving hazards",
journal="Bristol medico-chirurgical journal (1963)",
year="1967",
author="Lloyd, O. C.",
volume="82",
number="304",
pages="23-34",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0308-6356",
doi="",
url="http://dx.doi.org/"
}