A. V. Skitovich, “Conditions for the occurrence of the problem of center and focus”, Differ. Uravn., 1977, Volume 13, Number 6,Pages <nobr>1061

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Differ. Uravn., 1977 Volume 13, Number 6, Pages 1061–1069 (Mi de3094)

Ordinary Differential Equations

Conditions for the occurrence of the problem of center and focus

A. V. Skitovich

Leningrad State University

UDC: 517.925.12

Received: 18.02.1975

Fulltext: PDF file (828 kB)

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