@ARTICLE{Marcak_Henryk_Seismicity_2012,
 author={Marcak, Henryk},
 number={No 1},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2012},
 publisher={Committee of Mining PAS},
 title={Seismicity in mines due to roof layer bending rozwój / Sejsmiczności górniczej w rezultacie uginania się stropu},
 URL={http://journals.pan.pl/Content/92762/PDF/10267-Volume57_Issue1-16_paper.pdf},
 doi={10.2478/v10267-012-0016-3},
}