@article{TM_2019_304_a9,
     author = {A. A. Davydov and Yu. A. Kasten},
     title = {On {Structural} {Stability} of {Characteristic} {Nets} and the {Cauchy} {Problem} for a {Tricomi--Cibrario} {Type} {Equation}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {159--166},
     publisher = {mathdoc},
     volume = {304},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TM_2019_304_a9/}
}