
JETP, Vol. 47,
No. 2,
p. 232 (February 1978)
(Russian original - ZhETF,
Vol. 74,
No. 2,
p. 445,
February 1978
)
Higher orders of perturbation theory and summation of series in quantum mechanics and field theory
V.S. Popov, V.l. Eletskii, A.V. Turbiner
Received: August 26, 1977
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