%0 Journal Article %A A. A. Davydov %A Yu. A. Kasten %T On Structural Stability of Characteristic Nets and the Cauchy Problem for a Tricomi--Cibrario Type Equation %J Informatics and Automation %D 2019 %P 159-166 %V 304 %I mathdoc %U http://geodesic.mathdoc.fr/item/TRSPY_2019_304_a9/ %G ru %F TRSPY_2019_304_a9