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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 36, No. 2, pp. 172–180, March–April, 1984.
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Lomov, S.A., Safonov, V.F. Regularitization and asymptotic solutions of singularly perturbed problems with point singularities in the spectrum of the limiting operator. Ukr Math J 36, 154–162 (1984). https://doi.org/10.1007/BF01066947
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DOI: https://doi.org/10.1007/BF01066947