@misc{indiciae802a4988a547,
  title = {Variational perturbation theory for Markov processes.},
  author = {Hagen Kleinert and Axel Pelster and Mihai V Putz},
  year = {2002},
  doi = {10.1103/physreve.65.066128},
  url = {https://pubmed.ncbi.nlm.nih.gov/12188804/},
  note = {Source identifier: 12188804}
}