@ARTICLE{Kaula_Roman_Hybrid_2000,
 author={Kaula, Roman},
 number={No 4},
 journal={Archives of Mining Sciences},
 pages={511-526},
 howpublished={online},
 year={2000},
 publisher={Committee of Mining PAS},
 type={Article},
 title={Hybrid Control Problems of Coal Flotation Process},
 URL={http://ochroma.man.poznan.pl/Content/132304/PDF-MASTER/7_MINING_45_4_2000_Kaula_HYBRID.pdf},
}