%0 Journal Article %A A. G. Alekhno %T A homogeneous Riemann problem with a coefficient that has a discontinuity of the second kind %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1990 %P 29-34 %N 2 %U http://geodesic.mathdoc.fr/item/IVM_1990_2_a2/ %G ru %F IVM_1990_2_a2