@ARTICLE{Onica_Ilie_Ground_2012,
 author={Onica, Ilie and Marian, Dacian},
 number={No 3},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2012},
 publisher={Committee of Mining PAS},
 title={Ground surface subsidence as effect of underground mining of the thick coal seams in the Jiu valley basin / Osiadanie gruntów wskutek wybierania pokładów o dużej miąższości w kopalniach zagłębia w dolinie Jiu},
 URL={http://journals.pan.pl/Content/92855/PDF/10267-Volume57_Issue3-05_paper.pdf},
 doi={10.2478/v10267-012-0036-z},
}