TY  - RPRT
TI  - Generating functionals for harmonic expectation values of paths with fixed end points: Feynman diagrams for nonpolynomial interactions.
AU  - H Kleinert
AU  - A Pelster
AU  - M Bachmann
PY  - 1999
DO  - 10.1103/physreve.60.2510
UR  - https://pubmed.ncbi.nlm.nih.gov/11970049/
ID  - 11970049
ER  -