@article{ref1,
title="Notching in the QRS complex in the electrocardiograms of sportsmen",
journal="Annals of clinical research",
year="1969",
author="Raunio, H. and Anttonen, V. M. and Savola, P. and Pyykönen, L.",
volume="1",
number="1",
pages="5-12",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0003-4762",
doi="",
url="http://dx.doi.org/"
}