VakarchukS. B. and ShabozovM. S. (1996) “Quasiwidths and optimization of methods of mixed approximation of multidimensional singular integrals with kernels of hilbert type”, Ukrains’kyi Matematychnyi Zhurnal, 48(6), pp. 753-770. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5276 (Accessed: 24November2024).