@misc{indiciaecb9a77b29809,
  title = {Stress field in granular systems: loop forces and potential formulation.},
  author = {Robin C Ball and Raphael Blumenfeld},
  year = {2002},
  doi = {10.1103/physrevlett.88.115505},
  url = {https://pubmed.ncbi.nlm.nih.gov/11909410/},
  note = {Source identifier: 11909410}
}