@misc{indiciae50a64229db1e, title = {Generating functionals for harmonic expectation values of paths with fixed end points: Feynman diagrams for nonpolynomial interactions.}, author = {H Kleinert and A Pelster and M Bachmann}, year = {1999}, doi = {10.1103/physreve.60.2510}, url = {https://pubmed.ncbi.nlm.nih.gov/11970049/}, note = {Source identifier: 11970049} }