@misc{Dąbrowski_Mirosław_The,
 author={Dąbrowski, Mirosław and Kondratek, Bartosz},
 howpublished={online},
 publisher={Educational Research Institute},
 language={eng},
 type={article},
 title={The effects of the Playing with pictograms package},
 keywords={mathematical education, teaching style, IRT modeling, multilevel regression, cluster-randomised experiment},
}