Pereverzeva, G.A. (1999) “Projection methods for the solution of Fredholm integral equations of the first kind with $(ϕ, β)$-differentiable kernels and random errors”, Ukrains’kyi Matematychnyi Zhurnal, 51(5), pp. 713–717. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4657 (Accessed: 14 April 2025).