Naimi M, Benharrat M. Further inequalities for the numerical radius of off-diagonal part of 2 by 2 operator matrices. Tamkang J. Math. [Internet]. 2025 Feb. 25 [cited 2025 Sep. 4];56(3):321-33. Available from: https://journals.math.tku.edu.tw/index.php/TKJM/article/view/5435