Dragomir, Silvestru Sever. “Hypo-Q-Norms on a Cartesian Product of Algebras of Operators on Banach Spaces”. Annales Mathematicae Silesianae 34, no. 2 (February 1, 2020): 169–192. Accessed April 24, 2025. https://journals.us.edu.pl/index.php/AMSIL/article/view/13610.