TY - JOUR L1 - http://www.journals.pan.pl/Content/93725/PDF/10267-Volume59_Issue4-12_paper.pdf L2 - http://www.journals.pan.pl/Content/93725 PY - 2014 IS - No 4 DO - 10.2478/amsc-2014-0070 A1 - Wierzbicki, Mirosław A1 - Skoczylas, Norbert PB - Committee of Mining PAS DA - 2014 T1 - The Outburst Risk as a Function of the Methane Capacity and Firmness of a Coal Seam UR - http://www.journals.pan.pl/dlibra/publication/edition/93725 T2 - Archives of Mining Sciences ER -