O. V. Ivanov, “The structure of Banach algebras of bounded continuous functions on the open disk that contain $H^{∞}$, the Hoffman algebra, and nontangential limits”, Ukr. Mat. Zhurn., vol. 45, no. 7, pp. 924–931, Jul. 1993, Accessed: Apr. 09, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/5885