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Additional information
State University, Moscow. Translated from Teoreticheskaya i Matematicheskaya Fizika, Vol. 44, No. 3, pp. 381–386, September, 1980.
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Lakaev, S.N. Discrete spectrum and resonances of a one-dimensional Schrödinger operator for small values of the coupling constants. Theor Math Phys 44, 810–814 (1980). https://doi.org/10.1007/BF01029047
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DOI: https://doi.org/10.1007/BF01029047