Dawood Muhsin S, Mohammed Khalaf A. On The Class of (K-N)* Quasi-N-Normal Operators on Hilbert Space. Iraqi Journal of Science [Internet]. 2021 Nov. 24 [cited 2025 Dec. 8];58(4B):2172-6. Available from: https://www.ijs.uobaghdad.edu.iq/index.php/eijs/article/view/5612