@article{ref1,
title="Compressed air injury of the colon",
journal="Zentralblatt fur Chirurgie",
year="1969",
author="Spängler, H.",
volume="94",
number="15",
pages="515-518",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0044-409X",
doi="",
url="http://dx.doi.org/"
}