@article{ref1,
title="There is no such thing as an international elite under-9 soccer player",
journal="Journal of sports science and medicine",
year="2018",
author="Kirkland, Andrew and O'Sullivan, Mark",
volume="17",
number="4",
pages="686-688",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="1303-2968",
doi="",
url="http://dx.doi.org/"
}