A comparison of ideologically-motivated homicides from the new extremist crime database and homicides from the supplementary homicide reports using multiple imputation by chained equations to handle missing values
American terrorism and extremist crime data sources and selectivity bias: an investigation focusing on homicide events committed by far-right extremists
Microcycles of violence: evidence from terrorist attacks by ETA and the FMLN
Spatial and temporal patterns of terrorist attacks by ETA 1970 to 2007