@misc{Sajkiewicz_Jan_The,
 author={Sajkiewicz, Jan},
 howpublished={online},
 publisher={Wydawnictwo Politechniki Śląskiej},
 language={eng},
 title={The development of theory concerning operation of mining machine systems of continuous engineering structures. Basic results of investigations},
 type={artykuł},
 keywords={Politechnika Śląska, górnictwo, przemysł górniczy, technika górnicza},
}