An Overview of Flexible Spectrum Management Approaches for 6G. - Hannu Flinck; Tanesh Kumar; Prasidh Ramabadran; Efstathios Katranaras; Luis Guilherme Uzeda Garcia; Iman Hmedoush; M. Sayed Hassan; Mikhail Wilhelm; S. Meyer; Christian Drewes; Petri Mähönen (IEEE Access, 2025)