@article{CMFD_2018_64_4_a0,
     author = {R. D. Aloev and M. U. Khudayberganov},
     title = {A discrete analog of the {Lyapunov} function for hyperbolic systems},
     journal = {Contemporary Mathematics. Fundamental Directions},
     pages = {591--602},
     publisher = {mathdoc},
     volume = {64},
     number = {4},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/CMFD_2018_64_4_a0/}
}