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Additional information
Translated from Sibirskii Matematicheskii Zhurnal, Vol. 19, No. 4, pp. 721–734, July–August, 1978.
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Alimov, S.A. Expansion of continuous functions from Sobolev classes in eigenfunctions of the Laplace operator. Sib Math J 19, 507–517 (1978). https://doi.org/10.1007/BF00967721
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DOI: https://doi.org/10.1007/BF00967721