@article{ref1,
title="Extension injuries of the thoracic spine",
journal="Chirurgia Narzadow Ruchu i Ortopedia Polska",
year="1956",
author="Malawski, S.",
volume="21",
number="1",
pages="69-72",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0009-479X",
doi="",
url="http://dx.doi.org/"
}