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Partially supported by Bulgarian Ministry of Science and Education under grant No. 52
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Vodev, G. Sharp polynomial bounds on the number of scattering poles for metric perturbations of the Laplacian in ℝn . Math. Ann. 291, 39–49 (1991). https://doi.org/10.1007/BF01445189
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DOI: https://doi.org/10.1007/BF01445189