%0 Journal Article %A A. P. Chugainova %A R. R. Polekhina %T Nonuniqueness of a Self-similar Solution to the Riemann Problem for Elastic Waves in Media with a Negative Nonlinearity Parameter %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2023 %P 251-265 %V 322 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2023_322_a19/ %G ru %F TM_2023_322_a19