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Location of the zeros of the derivative of an entire function whose zeros lie close to the real axis. (English. Russian original) Zbl 0096.05304
Sov. Math., Dokl. 1, 114-117 (1960); translation from Dokl. Akad. Nauk SSSR 130, 973-976 (1960).

MSC:
30-XX Functions of a complex variable
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