@misc{Nowik_Jerzy_Students'_2011,
 author={Nowik, Jerzy},
 type={artykuł},
 publisher={Wydawnictwo Akademii im. Jana Długosza w Częstochowie},
 title={Students' mathematical competence after completing the first stage of education},
 address={Częstochowa},
 year={2011},
 language={eng},
}