Mecheri S, Prasad T. Fuglede – Putnam type theorems for extension of $M$-hyponormal operators. Ukr. Mat. Zhurn. [Internet]. 2022Jan.24 [cited 2024Nov.21];74(1):89 - 98. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2355