@ARTICLE{Snopkowski_Ryszard_Longwall_2002,
 author={Snopkowski, Ryszard},
 number={No 3},
 journal={Archives of Mining Sciences},
 pages={413-420},
 howpublished={online},
 year={2002},
 publisher={Committee of Mining PAS},
 type={Article},
 title={Longwall output plan considered in probability aspect},
 URL={http://czasopisma.pan.pl/Content/132193/PDF/8_MINING_47_3_2002_Snopkowski_LONGWALL.pdf},
}