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// Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika
// Archive
Izv. Vyssh. Uchebn. Zaved. Mat.,
1969
Number 3,
Page 127
(Mi ivm3481)
Letter to the editors
L. N. Krivonosov
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Steklov Math. Inst. of RAS
, 2026
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