JETP, Vol. 9,
No. 4,
p. 830 (October 1959)
(Russian original - ZhETF,
Vol. 36,
No. 4,
p. 1168,
October 1959
)
Properties of the Spectrum of Elementary Excitations near the Disintegration Threshold of the Excitations
L.P. Pitaevskii
Received: October 6, 1958
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