CERBERUS: Towards Secure and Automated Multi-operator Management in B5G Through a Dynamic Policy-Based ZSM Framework. - Emilio Garcia de La Calera Molina; Santiago Córcoles García; José Manuel Bernabé Murcia; Alejandro Molina Zarca; Antonio Fernandez Gómez-Skarmeta (J. Netw. Syst. Manag., 2026)