@misc{indiciaea99fd4f1d6de,
  title = {Variational method for finding periodic orbits in a general flow.},
  author = {Yueheng Lan and Predrag Cvitanović},
  year = {2004},
  doi = {10.1103/physreve.69.016217},
  url = {https://pubmed.ncbi.nlm.nih.gov/14995703/},
  note = {Source identifier: 14995703}
}