Rashid, Mohammad H.M., and Nifeen Altaweel. 2022. “The Fuglede-Putnam Theorem and Quasinormality for Class P-wA(s, T) Operators”. European Journal of Pure and Applied Mathematics 15 (3):1067-89. https://doi.org/10.29020/nybg.ejpam.v15i3.4412.