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“Properties of ~ Self-Adjoint and ~ Positive Operators in b- Hilbert Space”,
Iraqi Journal of Science
, vol. 59, no. 2C, pp. 1100–1104, Jun. 2018, Accessed: Apr. 06, 2025. [Online]. Available:
https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/382