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// Kvant
// Archive
Kvant,
2021
Number 10,
Pages
17–18
(Mi kvant3745)
Çàäà÷íèê «ÊÂÀÍÒÀ»
Çàäà÷è Ì2670–Ì2673, Ô2677–Ô2680
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Steklov Math. Inst. of RAS
, 2025