@ARTICLE{Krawczyk_Piotr_Proposal_2016, author={Krawczyk, Piotr and Majer, Marzena and KrzemieĊ„, 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://journals.pan.pl/Content/105553/PDF/10267-Volume61_Issue4-10_paper.pdf}, doi={10.1515/amsc-2016-0058}, }