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Translated from Matematicheskie Zametki, Vol. 31, No. 5, pp. 695–705, May, 1982.
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Epifanov, O.V. A criterion for a convolution to be epimorphic in arbitrary regions of the complex plane. Mathematical Notes of the Academy of Sciences of the USSR 31, 354–359 (1982). https://doi.org/10.1007/BF01145712
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DOI: https://doi.org/10.1007/BF01145712