@article{ref1,
title="Heart rate ultradian rhythm in pilots subjected to hypergravitational stress",
journal="Physiologist",
year="1992",
author="Kwarecki, K. and Orzeł, A and Zuzewicz, Krystyna",
volume="35",
number="1 Suppl",
pages="S65-6",
abstract="<p>[Abstract unavailable]</p> <p>Language: en</p>",
language="en",
issn="0031-9376",
doi="",
url="http://dx.doi.org/"
}