@article{ref1,
title="Studies on physiological characteristics of skin diving",
journal="Izvestiia na Instituta po Fiziologiia (Sofiia)",
year="1962",
author="Dobrev, D. and Kosev, R. and Bogdanov, P. and Piruova, B.",
volume="5",
number="",
pages="321-339",
abstract="<p>[Abstract unavailable]</p><p>Language: bg</p>",
language="bg",
issn="0068-3922",
doi="",
url="http://dx.doi.org/"
}