ZhETF, Vol. 66,
No. 1,
p. 109 (July 1974)
(English translation - JETP,
Vol. 39,
No. 1,
p. 49,
July 1974
)
The issue content is only available in english translation.
Invariants of the nonlinear oscillation equation
N.A. Tikhonov
Received: July 13, 1973
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