AbramovVyacheslav M. “Fixed-Point Theorem for an Infinite Toeplitz Matrix and Its Extension to General Infinite Matrices”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 3 (March 25, 2024): 315–325. Accessed December 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7324.