ZhETF, Vol. 79,
No. 5,
p. 1719 (November 1980)
(English translation - JETP,
Vol. 52,
No. 5,
p. 868,
November 1980
)
The issue content is only available in english translation.
Perturbation theory and variation principle in quantum mechanics
A.V. Turbiner
Received: April 21, 1980
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Golden Pages
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