@article{ref1,
title="Educational and physical training excursions of school children in winter of 1952",
journal="Lekársky Obzor",
year="1953",
author="Rolný, D. and Kukura, J.",
volume="2",
number="12",
pages="754-760",
abstract="<p>[Abstract unavailable]</p><p>Language: un</p>",
language="un",
issn="0457-4214",
doi="",
url="http://dx.doi.org/"
}