@article{ref1,
title="Bronchopulmonary changes caused by foreign bodies in the tracheobronchial tree",
journal="Pediatria Polska",
year="1982",
author="Zebrak, J. and Kopytko, E. and Rudnik, I. and Pisiewicz, K. and Zuk, E. and Skuza, B.",
volume="57",
number="2-3",
pages="115-121",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0031-3939",
doi="",
url="http://dx.doi.org/"
}