@misc{indiciaeded79ec300ff,
  title = {Statistical mechanical theory for steady state systems. VI. Variational principles.},
  author = {Phil Attard},
  year = {2006},
  doi = {10.1063/1.2400859},
  url = {https://pubmed.ncbi.nlm.nih.gov/17166028/},
  note = {Source identifier: 17166028}
}