@misc{Zygmunt_Wojciech_A,
 author={Zygmunt, Wojciech},
 howpublished={online},
 publisher={nakładem Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={artykuł},
 title={A Note on the Blasis’s Method of an Approximation to an upper semicontinuous multifunction},
 keywords={Blasis's method of approximation, upper semicontinuous multifunction},
}