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@article{DE_2006_42_1_a7, author = {D. V. Kornienko}, title = {On a spectral problem for two hyperbolic systems}, journal = {Differencialʹnye uravneni\^a}, pages = {91--100}, publisher = {mathdoc}, volume = {42}, number = {1}, year = {2006}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_2006_42_1_a7/} }
D. V. Kornienko. On a spectral problem for two hyperbolic systems. Differencialʹnye uravneniâ, Tome 42 (2006) no. 1, pp. 91-100. http://geodesic.mathdoc.fr/item/DE_2006_42_1_a7/