Nguen, Byong. “Discrepancy Principle and Convergence Rates in Regularization of Monotone Ill-Posed Problems”. Ukrains’kyi Matematychnyi Zhurnal 55, no. 7 (July 25, 2003): 991-997. Accessed May 18, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3974.