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JOURNALS
// Matematicheskii Sbornik
// Archive
Mat. Sb. (N.S.),
1949
Volume 24(66),
Number 2,
Pages
129–162
(Mi sm5973)
This article is cited in
6
papers
Vector fields on manifolds
L. S. Pontryagin
Received:
06.06.1947
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, 2025