@misc{Martyna_Roman_The,
 author={Martyna, Roman},
 howpublished={online},
 publisher={Wydawnictwo Politechniki Śląskiej},
 language={pol},
 title={The determination of the weakening of mine winding ropes caused by the long, soft changes of their cross sectional area},
 type={artykuł},
 keywords={Politechnika Śląska, górnictwo, przemysł górniczy, technika górnicza},
}