@misc{indiciae9730b8acbd1b,
  title = {Why hour glasses tick.},
  author = {Xl Wu and KJ Måloy and A Hansen and M Ammi and D Bideau},
  year = {1993},
  doi = {10.1103/physrevlett.71.1363},
  url = {https://pubmed.ncbi.nlm.nih.gov/10055521/},
  note = {Source identifier: 10055521}
}