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Translated fromSibirskiî Matematicheskiî Zhurnal, Vol. 35, No. 5, pp. 100–1005, September–October, 1994.
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Ismailov, Z.I. A three-point normal boundary value problem for an operator-differential equation. Sib Math J 35, 941–944 (1994). https://doi.org/10.1007/BF02104571
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DOI: https://doi.org/10.1007/BF02104571