TY - JOUR A1 - Betz, Fridtjof A1 - Binkowski, Felix A1 - Hammerschmidt, Martin A1 - Zschiedrich, Lin A1 - Burger, Sven T1 - Resonance expansion of quadratic quantities with regularized quasinormal modes T2 - Phys. Status Solidi A Y1 - 2023 UR - https://opus4.kobv.de/opus4-zib/frontdoor/index/index/docId/8933 VL - 220 SP - 2200892 ER -