Phiangsungnoen S. Ulam-Hyers Stability and Well-posedness of the Fixed Point Problems for Contractive Multi-valued Operator in \(b\)-metric Spaces. Comm. Math. Appl. [Internet]. 2016 Nov. 14 [cited 2025 Jun. 16];7(3):241-62. Available from: http://www.journals.rgnpublications.com/index.php/cma/article/view/434