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Additional information
Ukrainian branch of VNIPIASU-gazprom. Translated from Funktsional'nyi Analiz i Ego Prilozheniya, Vol. 9, No. 4, pp. 91–92, October–December, 1975.
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Russakovskii, E.M. Operator treatment of boundary problems with spectral parameters entering via polynomials in the boundary conditions. Funct Anal Its Appl 9, 358–359 (1975). https://doi.org/10.1007/BF01075895
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DOI: https://doi.org/10.1007/BF01075895