@misc{Kierat_Władysław_Differential,
 author={Kierat, Władysław and Sztaba, Urszula},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Śląskiego},
 language={eng},
 title={Differential equations of the second order with measures as coefficients},
 type={artykuł},
 keywords={matematyka},
}