@misc{indiciaed52b4e758558,
  title = {Diffusion and mobility in a stirred dense granular material.},
  author = {Junfei Geng and R P Behringer},
  year = {2004},
  doi = {10.1103/physrevlett.93.238002},
  url = {https://pubmed.ncbi.nlm.nih.gov/15601205/},
  note = {Source identifier: 15601205}
}