@misc{Pik_Derk_Time-variant,
 author={Pik, Derk},
 howpublished={online},
 publisher={Zielona Góra: Uniwersytet Zielonogórski},
 language={eng},
 type={artykuł},
 title={Time-variant Darlington synthesis and induced realizations},
 keywords={contractive linear systems, Darlington synthesis, time-variant linear systems},
}