@misc{Tadeusiewicz_Michał._Signals,
 author={Tadeusiewicz, Michał.},
 copyright={Tadeusiewicz, Michał.},
 howpublished={online},
 publisher={Technical University of Lodz Publisher},
 language={eng},
 type={book},
 type={language document},
 type={TUL textbook},
 title={Signals and systems},
}