Tishchenko, S.V. (2001) “On One Class of Matrix Topological *-Algebras”, Ukrains’kyi Matematychnyi Zhurnal, 53(10), pp. 1436–1439. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4363 (Accessed: 6 December 2025).