@article{ref1,
title="The concept and various types of fatigue",
journal="Beitrage zur Gerichtlichen Medizin",
year="1965",
author="Ponsold, A.",
volume="23",
number="",
pages="200-206",
abstract="<p>[Abstract unavailable]</p><p>Language: de</p>",
language="de",
issn="0067-5016",
doi="",
url="http://dx.doi.org/"
}