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Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 38, No. 3, pp. 324–330, May–June, 1986.
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Klevchuk, I.I., Fodchuk, V.I. Bifurcation of singular points of differential-functional equations. Ukr Math J 38, 281–286 (1986). https://doi.org/10.1007/BF01056824
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DOI: https://doi.org/10.1007/BF01056824