@article{IM2_1971_5_3_a11,
     author = {R. K. Romanovskii and A. M. Biberman},
     title = {Criteria for the boundness of the solutions of the {Cauchy} problem for a~sistem of hyperbolic difference equations},
     journal = {Izvestiya. Mathematics },
     pages = {711--718},
     publisher = {mathdoc},
     volume = {5},
     number = {3},
     year = {1971},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1971_5_3_a11/}
}