Bayev, A. (2006) “The Lagrange principle and finite-dimensional approximations in the optimal inverse problem for linear operators”, Numerical Methods and Programming (Vychislitel’nye Metody i Programmirovanie), 7(10), pp. 323–336. Available at: https://en.num-meth.ru/index.php/journal/article/view/224 (Accessed: 29 April 2024).