@ARTICLE{Woźny_Tadeusz_Changes_2003,
 author={Woźny, Tadeusz and Głodzik, Stanisław},
 number={No 1},
 journal={Gospodarka Surowcami Mineralnymi - Mineral Resources Management},
 pages={69-83},
 howpublished={online},
 year={2003},
 publisher={Komitet Zrównoważonej Gospodarki Surowcami Mineralnymi PAN},
 publisher={Instytut Gospodarki Surowcami Mineralnymi i Energią PAN},
 abstract={In the period 1993-2000 several activities were undertaken in the hard coal mining sector aimed reduction of production costs. In the paper an analysis of changes between components of the unit cost of production based on tabular specifications and their graphical interpretations is presented.},
 type={Artykuł},
 title={Changes in the relationship between components of unit cost of production of hard coal in the period 1993-2000},
 URL={http://ochroma.man.poznan.pl/Content/132478/PDF/6_GSM_19_1_2003_Wozny_Zmiany.pdf},
 keywords={hard coal mining, unit cost of production},
}