@misc{indiciaefb7aaaa49faf,
  title = {Rock mechanics: Luminous phenomena and their relationship to rock fracture},
  author = {J.S. Derr},
  year = {1986},
  doi = {10.1038/321470a0},
  url = {https://pubs.usgs.gov/publication/70015328},
  note = {Source identifier: 70015328}
}