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On a formula of Gel'fand-Levitan
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On a simple identity for the characteristic values of a differential operator of the second order
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I. M. Gel'fand and B. M. Levitan. On a simple identity for the characteristic values of a differential operator of the second order. Dokl. Akad. Nauk SSSR, 88, (1953), 593-596 (in Russian).
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Trace formulas for the Schroedinger operator
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V. B. Lidskii and V. A. Sadovnichii. Regularized sums of roots of a class of entire functions. Functional Anal, i Priložen., 1, (1967), 52-59 (in Russian); English transl.: Funct. Anal. Appl., 1, (1967), 133-139.
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V. B. Lidskii and V. A. Sadovnichii. Regularized sums of roots of a class of entire functions. Functional Anal, i Priložen., 1, (1967), 52-59 (in Russian); English transl.: Funct. Anal. Appl., 1, (1967), 133-139.
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A. S. Makin. On the Basis Property of System of Root Functions of Regular Boundary Value Problems for the Sturm-Liouville operator. Differ. Uravn., 42, (2006), 1645-1656 (in Russian); English transl.: Differ. Equations, 42, (2006), 1717-1728.
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A. S. Makin. On the Basis Property of System of Root Functions of Regular Boundary Value Problems for the Sturm-Liouville operator. Differ. Uravn., 42, (2006), 1645-1656 (in Russian); English transl.: Differ. Equations, 42, (2006), 1717-1728.
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A. S. Makin. Trace Formulas for the Sturm-Liouville Operator with Regular Boundary Conditions. Dokl. Acad. Nauk, 416, (2007), 308-313 (in Russian); English transl.: Dokl. Math., 76, (2007), 702-707.
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A. S. Makin. Trace Formulas for the Sturm-Liouville Operator with Regular Boundary Conditions. Dokl. Acad. Nauk, 416, (2007), 308-313 (in Russian); English transl.: Dokl. Math., 76, (2007), 702-707.
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M. A. Naimark. Linear Differential Operators. Ungarn, New York, 1967; Nauka, Moscow, 1969 (in Russian).
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M. A. Naimark. Linear Differential Operators. Ungarn, New York, 1967; Nauka, Moscow, 1969 (in Russian).
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V. A. Sadovnichii and V. E. Podol'skii. Traces of operators. Uspekhi Mat. Nauk, 61, (2006), 89-156 (in Russian); English, transl.: Russian Math. Surveys, 61, (2006), 885-953.
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V. A. Sadovnichii and V. E. Podol'skii. Traces of operators. Uspekhi Mat. Nauk, 61, (2006), 89-156 (in Russian); English, transl.: Russian Math. Surveys, 61, (2006), 885-953.
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Characterization of the periodic and antiperiodic spectra of nonselfadjoint Hill's operators
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J.-J. Sansuc, V. Tkachenko. Characterization of the periodic and antiperiodic spectra of nonselfadjoint Hill's operators. Oper. Theory Adv. Appl., 98, (1997), 216-224.
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Sansuc, J.-J.1
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