R. Karlović, H. Nitsch, E. Fikenscher, D. Osterman, S. Menexis, T. Tsikrika, S. Vrochidis, I. Kompatsiaris, A. Sahar, “The Threat of Behavioral Radicalization Online: Conceptual Challenges and Technical Solutions Provided by the PROPHETS (Preventing Radicalization Online through the Proliferation of Harmonized ToolkitS) Project.”, in Security Technologies and Social Implications: A European Perspective, G. Markarian, R. Karlović, H. Nitsch, and K. Chandramouli, Eds., 2022 (accepted for publication).