@article{ji_cabas_bonilla_gelis_2021, title={Effects of Nonlinear Soil Behavior on Kappa (kappa): Observations from the KiK-Net Database}, DOI={10.1785/0120200286}, journal={BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA}, author={Ji, Chunyang and Cabas, Ashly and Bonilla, Luis Fabian and Gelis, Celine}, year={2021}, month={Aug} }
 @article{ji_cabas_cotton_pilz_bindi_2020, title={Within-Station Variability in Kappa: Evidence of Directionality Effects}, volume={110}, ISBN={1943-3573}, DOI={10.1785/0120190253}, number={3}, journal={BULLETIN OF THE SEISMOLOGICAL SOCIETY OF AMERICA}, author={Ji, Chunyang and Cabas, Ashly and Cotton, Fabrice and Pilz, Marco and Bindi, Dino}, year={2020}, month={Jun}, pages={1247–1259} }