@article{ref1,
title="Capacity for physical effort required of men for mountaineering",
journal="South African medical journal SAMJ",
year="1970",
author="Greyson, J. S. and van Graan, C. H.",
volume="44",
number="33",
pages="951-954",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0038-2469",
doi="",
url="http://dx.doi.org/"
}