Haralampidou, Marina. “Interrelations Between Annihilator, Dual and Pseudo-$H$-Algebras”. Communications in Mathematics and Applications 3, no. 1 (January 29, 2012): 25–38. Accessed April 29, 2024. https://www.rgnpublications.com/journals/index.php/cma/article/view/142.