@article{ref1,
title="Carbon dioxide changes in hyperventilation and breath-hold diving",
journal="South African medical journal SAMJ",
year="1974",
author="Landsberg, P. G.",
volume="48",
number="1",
pages="18-22",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}