
JETP, Vol. 68,
No. 1,
p. 119 (January 1989)
(Russian original - ZhETF,
Vol. 95,
No. 1,
p. 211,
January 1989
)
Functional method for quantum ferromagnets, and nonmagnon dynamics at low temperatures
I.V. Kolokolov, E.V. Podivilov
Received: May 19, 1988
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