JETP, Vol. 20,
No. 5,
p. 1172 (May 1965)
(Russian original - ZhETF,
Vol. 47,
No. 5,
p. 1742,
May 1965
)
The Number of Diagrams for the One-particle and Two-particle Green's Functions in the Case of Direct Interaction of Fermions
A.A. Akopyan
Received: February 15, 1964
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