@article{PhysRevFocus.3.12,
  title = {Probing a Sandpile with Sound},
  author = {Hellemans, Alexander},
  journal = {Phys. Rev. Focus},
  volume = {3},
  issue = {},
  pages = {12},
  numpages = {1},
  year = {1999},
  month = {Mar},
  doi = {10.1103/PhysRevFocus.3.12},
  url = {http://link.aps.org/doi/10.1103/PhysRevFocus.3.12},
  publisher = {American Physical Society}
}