A certain property of a system of eigenfunctions on the boundary of the domain and its applications
English version (Springer): Ukrainian Mathematical Journal 41 (1989), no. 11, pp 1352-1354.
Citation Example: Kuzenkov O. A., Plotnikov V. I. A certain property of a system of eigenfunctions on the boundary of the domain and its applications // Ukr. Mat. Zh. - 1989. - 41, № 11. - pp. 1566–1568.
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