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- [2] DECAY OF LOCAL ENERGY OF PERTURBED WAVE-EQUATION - PRELIMINARY-REPORT NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1976, 23 (01): : A12 - A12
- [8] DECAY OF SOLUTIONS OF TWO DIMENSIONAL WAVE-EQUATION IN EXTERIOR OF A STRAIGHT STRIP NOTICES OF THE AMERICAN MATHEMATICAL SOCIETY, 1974, 21 (01): : A148 - A148