Gürdal, Mehmet, and Vuk Stojiljkovic. “Berezin Radius Inequalities for Finite Sums of Functional Hilbert Space Operators”. Gulf Journal of Mathematics 17, no. 1 (June 28, 2024): 101-109. Accessed January 23, 2025. https://gjom.org/index.php/gjom/article/view/1885.