@misc{Cipora_Krzysztof_Improving,
 author={Cipora, Krzysztof and Szczygieł, Monika},
 howpublished={online},
 publisher={Educational Research Institute},
 language={pol},
 type={article},
 title={Improving early number competence by board game intervention},
 keywords={psychology, board games, intervention, early mathematics, number competence, number sense},
}