TY  - RPRT
TI  - Variational approximation for two-time correlation functions in Phi 4 theory: Optimization of the dynamics.
AU  - C Martin
PY  - 1995
DO  - 10.1103/physrevd.52.7121
UR  - https://pubmed.ncbi.nlm.nih.gov/10019252/
ID  - 10019252
ER  -