1. Akhtar, R., Winsborough, D., Ort, U., Johnson, A., & Chamorro-Preuzic, T. (2018). Detecting the dark side of personality using social media status updates. Personality and Individual Differences, 132, 90–97.
2. Auxemery, Y. (2015). The mass murderer history: Modern classifications, sociodemographic and psychopathological characteristics, suicidal dimensions, and media contagion of mass murders. Comprehensive Psychiatry, 56, 149–154.
3. Berkowitz, B., Gamio, L., Lu, D., & Alcantara, C. (2018). The math of mass shootings. The Washington Post. Retrieved December 21, 2018, from https://www.washingtonpost.com/graphics/2018/national/mass-shootings-in-america/.
4. Bogolyubova, O., Panicheya, P., Tikonov, R., Ivanov, V., & Ledovaya, Y. (2018). Dark personalities on Facebook: Harmful online behaviors and language. Computers in Human Behavior, 78, 151–159.
5. Costa, P., & McCrae, R. (1992). Revised NEO Personality Inventory (NEO PI-R) and NEO Five-Factor Inventory (NEO-FFI). Lutz, FL: Psychological Assessment Resources.