AbdullayevF. G. and KüçükaslanM. (2002) “On the Convergence of Fourier Series with Orthogonal Polynomials inside and on the Closure of a Region”, Ukrains’kyi Matematychnyi Zhurnal, 54(10), pp. 1299-1312. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4169 (Accessed: 22November2024).