@article{ref1,
title="Self-inflicted injury: introduction of a foreign body into the bronchial tree",
journal="Polski przeglad chirurgiczny",
year="1971",
author="Ponizyński, A. and Sedlaczek, A.",
volume="43",
number="4",
pages="635-637",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0032-373X",
doi="",
url="http://dx.doi.org/"
}