%0 Journal Article %A L. I. Chibrikova %A I. G. Salekhova %T The Riemann problem in the case of a countable set of contours %J Trudy seminara po kraevym zadačam %D 1972 %P 216-233 %V 9 %N 9 %I mathdoc %U http://geodesic.mathdoc.fr/item/KUKZ_1972_9_9_a23/ %G ru %F KUKZ_1972_9_9_a23