Kaplan, Makbule. “Approximation of Common Fixed Points of Two Multivalued Nonexpansive Mappings in Cat (0) Spaces”. Current Topics on Mathematics and Computer Science Vol. 6 (July 21, 2021): 104–110. Accessed June 4, 2026. https://stm.bookpi.org/CTMCS-V6/article/view/2588.