@article{ref1,
title="Cross-country skiing and changes in electrolytes",
journal="Schweizerische Zeitschrift fur Sportmedizin",
year="1977",
author="Berg, A.",
volume="25",
number="4",
pages="185-189",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0036-7885",
doi="",
url="http://dx.doi.org/"
}