%0 Journal Article %A A. A. Bolibrukh %T On sufficient conditions for the positive solvability of the Riemann--Hilbert problem %J Matematičeskie zametki %D 1992 %P 9-19 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1992_51_2_a1/ %G ru %F MZM_1992_51_2_a1