TY - JOUR A1 - Frésard, Raymond A1 - Hackenberger, Christian A1 - Kopp, Thilo T1 - Magnetic transitions in strong coupling expansions for nearly degenerate states T2 - Annalen der Physik Y1 - 2018 UR - https://opus.bibliothek.uni-augsburg.de/opus4/frontdoor/index/index/docId/38857 VL - 524 IS - 8 SP - 411 EP - 420 ER -