@article{ref1,
title="Physical working capacity at maximum levels of work, of boys 12-18 years of age",
journal="Zeitschrift fur Arztliche Fortbildung (Jena)",
year="1968",
author="Bink, B. and Wafelbakker, F.",
volume="62",
number="17",
pages="957-961",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0044-2178",
doi="",
url="http://dx.doi.org/"
}