%0 Journal Article %A B. V. Boyarsky %T A special case of the Riemann--Hilbert problem %J Doklady Akademii Nauk %D 1958 %P 411-414 %V 119 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1958_119_3_a1/ %G ru %F DAN_1958_119_3_a1