%0 Journal Article %A M. A. Kudryavtsev %T The Riemann problem with additional singularities %J Žurnal matematičeskoj fiziki, analiza, geometrii %D 2000 %P 196-208 %V 7 %N 2 %U http://geodesic.mathdoc.fr/item/JMAG_2000_7_2_a4/ %G ru %F JMAG_2000_7_2_a4