@article{ref1,
title="Elite youth sports",
journal="Pediatric exercise science",
year="2015",
author="Williams, Craig A.",
volume="27",
number="1",
pages="18-20",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0899-8493",
doi="10.1123/pes.2015-0029",
url="http://dx.doi.org/10.1123/pes.2015-0029"
}