@ARTICLE{Strzałkowska_Ewa_Variability_2017,
 author={Strzałkowska, Ewa},
 number={No 1},
 journal={Archives of Mining Sciences},
 howpublished={online},
 year={2017},
 publisher={Committee of Mining PAS},
 title={Variability Qualitative Phase Composition of the Different Grain Classes of the Calcareous Fly Ashes},
 URL={http://ochroma.man.poznan.pl/Content/105572/PDF/10267-Volume62_Issue1-17_paper.pdf},
 doi={10.1515/amsc-2017-0017},
}