@misc{Swoboda_Ewa_Geometrical_2007,
 author={Swoboda, Ewa},
 type={artykuł},
 publisher={Wydawnictwo Akademii im. Jana Długosza w Częstochowie},
 title={Geometrical activities as a tool for stimulating mathematical thinking of 4-7 years old children},
 address={Częstochowa},
 year={2007},
 language={eng},
}