@misc{indiciaefe5566b92494,
  title = {Gravity and Granular Materials},
  author = {Behringer, R. P. and Hovell, Daniel and Kondic, Lou and Tennakoon, Sarath and Veje, Christian},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20010004316},
  note = {Source identifier: 20010004316}
}