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- [2] BOUNDARY-VALUE-PROBLEMS FOR THE WAVE-EQUATION SOVIET PHYSICS ACOUSTICS-USSR, 1982, 28 (01): : 1 - 4
- [6] ON ONE APPROACH TO THE MULTIDIMENSIONAL INVERSE PROBLEMS FOR THE WAVE-EQUATION DOKLADY AKADEMII NAUK SSSR, 1987, 297 (03): : 524 - 527