@article{ref1,
title="Digital switching system EWSD: Operation and maintenance using expert system techniques",
journal="Journal of occupational accidents",
year="1990",
author="Sevcik, M.",
volume="13",
number="1-2",
pages="171-178",
abstract="<p>[Abstract unavailable]</p>",
language="",
issn="0376-6349",
doi="",
url="http://dx.doi.org/"
}