@misc{indiciae5bcea69e8071,
  title = {Diffusion in discrete ratchets.},
  author = {J A Freund and L Schimansky-Geier},
  year = {1999},
  doi = {10.1103/physreve.60.1304},
  url = {https://pubmed.ncbi.nlm.nih.gov/11969889/},
  note = {Source identifier: 11969889}
}