@ARTICLE{Lehtsier_Oleg_Determination_2012, author={Lehtsier, Oleg and Ulshin, Vitaly and Kilymnik, Oleg and Pismenskiy, Alexey}, number={No 4}, journal={Teka Commission of Motorization and Power Industry in Agriculture}, howpublished={online}, year={2012}, publisher={The Lublin Branch of the Polish Academy of Sciences}, title={Determination the dynamic parameters of the controlled technological processes of coal preparation by using the semi graphical method}, }