Terminal Voltage and Load Frequency Control in a Real Four-Area Multi-Source Interconnected Power System With Nonlinearities via OOBO Algorithm. - Tayyab Ali; Muhammad Asad; Ezzeddine Touti; Besma Bechir Graba; Mouloud Aoudia; Ghulam Abbas 003; Hammad Alnuman; Waleed Nureldeen (IEEE Access, 2024)