Rashid MHM, Noorani MSM. On relaxation normality in the Fuglede-Putnam theorem for a quasi-class $A$ operators. Tamkang J. Math. [Internet]. 2009 Sep. 30 [cited 2024 May 3];40(3):307-12. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/508