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Reference22 articles.
1. R. G. Douglas, “On majorization, factorization, and range inclusion of operators on Hilbert space,” Proc. Amer. Math. Soc., 17, 413–415 (1966).
2. B. C. Gupta, “An extension of Fuglede–Putnam theorem and normality of operators,” Indian J. Pure Appl. Math., 14, No. 11, 1343–1347 (1983).
3. B. C. Gupta and P. B. Ramanujan, “On k-quasihyponormal operators II,” Bull. Austral. Math. Soc., 24, No. 1, 61–67 (1981).
4. P. R. Halmos, A Hilbert Space Problem Book, 2 edn., Springer-Verlag, New York (1982).
5. S. Mecheri, “On k-quasi-M-hyponormal operators,” Math. Inequal. Appl., 16, 895–902 (2013).