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@article{DAN_1981_259_3_a9, author = {Kh. G. Umarov}, title = {Riemann's method for some hyperbolic equations with constant operator coefficients}, journal = {Doklady Akademii Nauk}, pages = {549--553}, publisher = {mathdoc}, volume = {259}, number = {3}, year = {1981}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1981_259_3_a9/} }
Kh. G. Umarov. Riemann's method for some hyperbolic equations with constant operator coefficients. Doklady Akademii Nauk, Tome 259 (1981) no. 3, pp. 549-553. http://geodesic.mathdoc.fr/item/DAN_1981_259_3_a9/