TY  - RPRT
TI  - Method to estimate center of rigidity using vibration recordings
AU  - Erdal Safak
AU  - Mehmet Çelebi
PY  - 1990
DO  - 10.1061/(asce)0733-9445(1990)116:1(85)
UR  - https://pubs.usgs.gov/publication/70016526
ID  - 70016526
ER  -