@article{ref1,
title="Spontaneous patellar fracture in a soccer player occurred 3 years and 3 months after anterior cruciate ligament reconstruction with central third bone-patellar tendon-bone graft",
journal="Knee surgery, sports traumatology, arthroscopy",
year="2007",
author="Salvi, Andrea Emilio and Metelli, Giovanni Pietro and Musella, Giovanni",
volume="15",
number="10",
pages="1280-1; author reply 1282",
abstract="<p>[Abstract unavailable]</p><p>Language: en</p>",
language="en",
issn="0942-2056",
doi="10.1007/s00167-007-0370-4",
url="http://dx.doi.org/10.1007/s00167-007-0370-4"
}