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JOURNALS
// Doklady Akademii Nauk
// Archive
Dokl. Akad. Nauk SSSR,
1972
Volume 203,
Number 5,
Pages
1008–1010
(Mi dan36827)
This article is cited in
1
paper
MATHEMATICS
On the problem of distinguishing between a center and a focus
S. D. Shchuko
Gorky Institute of Water Transport Engineers
UDC:
517.925
Presented:
I. G. Petrovskii
Received: 29.09.1971
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