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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 26, No. 1, pp. 13–24, January–February 1974.
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Orochko, Y.B. Spectral kernel of sturm — Liouville operator with unbounded operator coefficient. Ukr Math J 26, 9–17 (1974). https://doi.org/10.1007/BF01086042
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DOI: https://doi.org/10.1007/BF01086042