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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 29, No. 2, pp. 249–254, March–April, 1977.
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Grigorenko, V.K. Asymptotic representation of the solutions of linear differential equations when the characteristic equation has multiple roots. Ukr Math J 29, 188–192 (1977). https://doi.org/10.1007/BF01089248
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DOI: https://doi.org/10.1007/BF01089248