Schwinger–Dyson truncations in the all-soft limit: a case study,The European Physical Journal C - X-MOL
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Recursive graphical solution of closed Schwinger–Dyson equations in φ4-theory. (I). Generation of connected and one-particle irreducible Feynman diagrams - ScienceDirect
Nonequilibrium Green's Function Method: application to thermal transport and thermal expansion Wang Jian-Sheng ppt download
Schwinger–Dyson equation - Wikipedia
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Recursive graphical solution of closed Schwinger–Dyson equations in φ4-theory. (I). Generation of connected and one-particle irreducible Feynman diagrams - ScienceDirect