ZhETF, Vol. 33,
No. 2,
p. 478 (February 1958)
(English translation - JETP,
Vol. 6,
No. 2,
p. 373,
February 1958
)
The issue content is only available in english translation.
On the Improvement of Perturbation Theory Formulas
R.V. Tevikian
Received: February 20, 1957
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