TY  - RPRT
TI  - Orientation-independent, nongeometric-mean measures of seismic intensity from two horizontal components of motion
AU  - David M. Boore
PY  - 2010
DO  - 10.1785/0120090400
UR  - https://pubs.usgs.gov/publication/70041869
ID  - 70041869
ER  -