@ARTICLE{Krawczyk_Piotr_Proposal_2016,
 author={Krawczyk, Piotr and Majer, Marzena and Krzemień, Joanna},
 number={No 4},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2016},
 publisher={Committee of Mining PAS},
 title={Proposal of Economic Assessment of Hard Coal Mines Operation Conducted in Polish Conditions with the Use of Cost Benefit Analysis},
 URL={http://ochroma.man.poznan.pl/Content/105553/PDF/10267-Volume61_Issue4-10_paper.pdf},
 doi={10.1515/amsc-2016-0058},
}