TY  - RPRT
TI  - Moment-tensor solutions estimated using optimal filter theory: global seismicity, 1984-1987
AU  - S.A. Sipkin
AU  - R.E. Needham
PY  - 1989
DO  - 10.1016/0031-9201(89)90114-3
UR  - https://pubs.usgs.gov/publication/70016106
ID  - 70016106
ER  -