@misc{indiciaea39233e61143,
  title = {Period doubling and other nonlinear phenomena in volcanic earthquakes and tremor},
  author = {B.R. Julian},
  year = {2000},
  doi = {10.1016/s0377-0273(00)00165-7},
  url = {https://pubs.usgs.gov/publication/70021946},
  note = {Source identifier: 70021946}
}