
JETP, Vol. 28,
No. 4,
p. 769 (April 1969)
(Russian original - ZhETF,
Vol. 55,
No. 4,
p. 1470,
April 1969
)
The Geometric Optics Approximation in the General Case of Inhomogeneous and Nonstationary Media with Frequency and Spatial Dispersion
Yu. A. Kravtsov
Received: May 12, 1968
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