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@article{DE_1993_29_4_a8, author = {T. I. Kiguradze}, title = {Periodic boundary value problems for linear hyperbolic equations. {II}}, journal = {Differencialʹnye uravneni\^a}, pages = {637--645}, publisher = {mathdoc}, volume = {29}, number = {4}, year = {1993}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1993_29_4_a8/} }
T. I. Kiguradze. Periodic boundary value problems for linear hyperbolic equations. II. Differencialʹnye uravneniâ, Tome 29 (1993) no. 4, pp. 637-645. http://geodesic.mathdoc.fr/item/DE_1993_29_4_a8/