Azizov, M. “On the Optimal Rate of Convergence of the Projection-Iterative Method and Some Generalizations of It on a Class of Equations With Smoothing Operators”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 11 (November 25, 1996): 1448–1456. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5198.