[1]
M. V. Markin, “A Gelfand-Mazur type theorem for normed algebras”, MFAT, vol. 11, no. 1, pp. 63–64, Mar. 2005, Accessed: Dec. 16, 2025. [Online]. Available: https://zen.imath.kiev.ua/index.php/mfat/article/view/267