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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 46, No. 10, pp. 1304–1311, October, 1994.
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Aldashev, S.A. Well-posedness of many-dimensional Darboux problems for degenerating hyperbolic equations. Ukr Math J 46, 1434–1443 (1994). https://doi.org/10.1007/BF01066086
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DOI: https://doi.org/10.1007/BF01066086