ZhETF, Vol. 68,
No. 6,
p. 2341 (August 1975)
(English translation - JETP,
Vol. 41,
No. 6,
p. 1170,
August 1975
)
The issue content is only available in english translation.
Elementary excitations in quantum crystals
A.F. Andreev
Received: February 11, 1975
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