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// Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika
// Archive
Izv. Vyssh. Uchebn. Zaved. Mat.,
1967
Number 8,
Page 111
(Mi ivm3317)
Letter to the editors
A. E. Martynyuk
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Steklov Math. Inst. of RAS
, 2024
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