1. AIVD. (2018). Rechts Extremisme in Nederland: Een Fenomeen in beweging. Retrieved 19 March 2021 from https://www.aivd.nl/documenten/publicaties/2018/10/02/rechts-extremisme-in-nederland-een-fenomeen-in-beweging.
2. Bakker E. (2008). Terrorisme en politiek gewelddadig activisme in Nederland. Jaarboek vrede en veiligheid 222-236. Retrieved 19 March 2021 from https://www.clingendael.org/sites/default/files/2016-02/20090511_cscp_bakker_venv.pdf.
3. Bisoffi, D., & van der Vet, I. (2020). Comparative analysis of national decision-making procedures in the context of counter-radicalization: The case of Belgium, Italy, and the United Kingdom. In E. Reuge (Ed.), White Book on CVE: The Collection of Policy Papers (pp. 81-106). H2020 Mindb4Act. https://cris.vub.be/ws/portalfiles/portal/55018311/White_book2.pdf
4. Boersema W. & Vissers P. (2019 March 19). Gökmen T. een dader in het schemergebied tussen terrorist en crimineel. Trouw. Retrieved 19 March 2021 from https://www.trouw.nl/nieuws/gokmen-t-een-dader-in-het-schemergebied-tussen-terrorist-en-crimineel~b962fcee/.
5. Bullismo & Cyberbullismo. (2019). Linea di intervento ‘Bullout’ per la prevenzione e il contrasto del bullismo e del cyberbullismo di regione Lombardia. https://www.cyberbullismolombardia.it/pag/bullout/28/.