TY - JOUR AU - A. P. Chugainova AU - R. R. Polekhina TI - Nonuniqueness of a Self-similar Solution to the Riemann Problem for Elastic Waves in Media with a Negative Nonlinearity Parameter JO - Informatics and Automation PY - 2023 SP - 251 EP - 265 VL - 322 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TRSPY_2023_322_a19/ LA - ru ID - TRSPY_2023_322_a19 ER -