@misc{Ivanova_A._V._Change,
 author={Ivanova, A. V. and Shulga, V. F. and Zaitseva, L. B. and Savchuk, S. V. and Ivanina, A. V. and Pankova, M. G.},
 howpublished={online},
 publisher={Wydawnictwo Politechniki Śląskiej},
 language={eng},
 title={Change of the substantial composition and quality of coals along the stages of coal accumulation during the carboniferous in the Ukraine},
 type={artykuł},
 keywords={Politechnika Śląska, górnictwo, przemysł górniczy, technika górnicza},
}