%0 Journal Article %A V. K. Natalevich %T Non-linear singular integral equations and non-linear boundary problems of the theory of analytic functions %J Učënye zapiski Kazanskogo universiteta. Seriâ Fiziko-matematičeskie nauki %D 1952 %P 155-190 %V 112 %N 10 %I mathdoc %U http://geodesic.mathdoc.fr/item/UZKU_1952_112_10_a12/ %G ru %F UZKU_1952_112_10_a12