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• Volume 147

Author: Ould Ahmed Mahmoud, Sid Ahmed

• Al Mohammady, Samir; Ould Beinane, Sid Ahmed; Ould Ahmed Mahmoud, Sid Ahmed: On $(n,m)$-$A$-normal and $(n,m)$-$A$-quasinormal semi-Hilbertian space operators. (English). Mathematica Bohemica, vol. 147 (2022), issue 2, pp. 169-186