ZhETF, Vol. 56,
No. 4,
p. 1354 (October 1969)
(English translation - JETP,
Vol. 29,
No. 4,
p. 727,
October 1969
)
The issue content is only available in english translation.
Excitation Spectrum of an Antiferromagnetic Heisenberg Chain
A.A. Ovchinnikov
Received: December 5, 1968
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