@article{ref1,
title="Orientation to the vertical in free divers",
journal="Aerospace medicine",
year="1969",
author="Ross, H. E. and Crickmar, S. D. and Sills, N. V. and Owen, E. P.",
volume="40",
number="7",
pages="728-732",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0001-9402",
doi="",
url="http://dx.doi.org/"
}