Okelo, B., Jacob, G. and Kangogo, W. (trans.) (2025) “On Spectra of Symmetrized Two-Sided Multiplication Operators Implemented by Orthogonal Isometries ”, International Journal of Open Problems in Computer Science and Mathematics, 18(4), pp. 52–69. Available at: https://ijopcm.zuj.edu.jo/index.php/IJOPCM/article/view/40 (Accessed: 16 October 2026).