@misc{indiciae9fe5f3e2b49b,
  title = {Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1988-1989},
  author = {S.A. Sipkin and R.E. Needham},
  year = {1991},
  doi = {10.1016/0031-9201(91)90019-e},
  url = {https://pubs.usgs.gov/publication/70016700},
  note = {Source identifier: 70016700}
}