@misc{Bílek_Martin_Real,
 author={Bílek, Martin and Skalická, Petra and Rychtera, Jiří and Myška, Karel},
 howpublished={online},
 publisher={Pedagogical University of Kraków},
 language={eng},
 title={Real and virtual ph-meter in early chemistry education},
 type={referat},
 type={artykuł z pracy zbiorowej},
 keywords={chemistry education, virtual ph-meter},
}