Hybrid Power Market Forecasting Using an3 Interval-Valued Hidden Markov and Fuzzy Relational4 Particle Swarm Optimization Model. Eur. J. Pure Appl. Math. [Internet]. 2025 Nov. 5 [cited 2025 Dec. 5];18(4):6539. Available from: https://www.ejpam.com/index.php/ejpam/article/view/6539