1. Gaycken, S.: Cyberwar: Das Internet als Kriegsschauplatz. Open Source Press (2010)
2. Füllgraf, W.: Hacktivisten: Abschlussbericht zum Projektteil der Hellfeldbeforschung, Wiesbaden (2015)
3. Hald, S., Pedersen, J.: An updated taxonomy for characterizing hackers according to their threat properties. In: 2012 14th International Conference on Advanced Communication Technology (ICACT), pp. 81–86 (2012)
4. TrendMicro: U-Markt - Peering into the German Cybercriminal Underground (2015)
5. ENISA: ENISA Threat Landscape Report 2016: 15 Top Cyber-Threats And Trends (2017)