@misc{Klaczak_Jerzy_Kneser,
 author={Klaczak, Jerzy},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Śląskiego},
 language={eng},
 title={Kneser oscillation theorem for differential equations with piecewise constant argument},
 type={artykuł},
 keywords={matematyka},
}