%0 Journal Article %A M. Sh. Shabozov %A M. S. Saidusajnov %T Mean-square approximation of functions of a complex variable by Fourier sums in orthogonal systems %J Trudy Instituta matematiki i mehaniki %D 2019 %P 258-272 %V 25 %N 2 %U http://geodesic.mathdoc.fr/item/TIMM_2019_25_2_a22/ %G ru %F TIMM_2019_25_2_a22