Jeribi A, Mahfoudhi K. Quaternionic Davis–Wielandt shell in a right quaternionic Hilbert space. Ukr. Mat. Zhurn. [Internet]. 2023 Jun. 20 [cited 2025 Dec. 15];75(6):784-92. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/7146