@misc{indiciae86ddbf75a4dd,
  title = {Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1990},
  author = {S.A. Sipkin and R.E. Needham},
  year = {1992},
  doi = {10.1016/0031-9201(92)90157-q},
  url = {https://pubs.usgs.gov/publication/70017269},
  note = {Source identifier: 70017269}
}