[1]
Rashid, M.H.M. and Noorani, M.S.M. 2009. On relaxation normality in the Fuglede-Putnam theorem for a quasi-class $A$ operators. Tamkang Journal of Mathematics. 40, 3 (Sep. 2009), 307–312. DOI:https://doi.org/10.5556/j.tkjm.40.2009.508.