@article{ref1,
title="Dyspnea in children caused by foreign bodies in the trachea and esophagus",
journal="Pediatria Polska",
year="1954",
author="Lewenfisz, H.",
volume="29",
number="7",
pages="726-730",
abstract="<p>[Abstract unavailable]</p><p>Language: pl</p>",
language="pl",
issn="0031-3939",
doi="",
url="http://dx.doi.org/"
}