2020. Islamic Militant Activism in Belgium, The Netherlands and Germany: ‘Islands in a Sea of Disbelief’. Palgrave Macmillan. (mit Martijn de Koning und Ineke Roex)
2014. Salafisme. Utopische Idealen in Een Weerbarstige Praktijk. Almere: Parthenon. (mit Joas Wagemakers und Martijn de Koning)
2013. ‘Learning to Be Authentic. Religious Practices of German and Dutch Muslims Following the Salafiyya in Forums and Chat Rooms’. Dissertation. Nijmegen: Radboud University Nijmegen.
2020. ‘The Journalist-Ethnographer, Religious Diversity, and the Euphemization of Social Relations’. In Hijacked. A Critical Treatment of the Public Rhetoric of Good and Bad Religion, edited by Leslie Dorrough Smith, Steffen Führding, and Adrian Hermann, 87–97. Sheffield & Bristol: Equinox.
2012. ‘Religie en Cyber-Etnografie. Onderzoek naar religieuze praktijken in computer-gemedieerde omgevingen’. In Ervaren en ervaren worden. Opstellen over langdurig sociaalwetenschappelijk veldonderzoek, edited by Lammert Gosse Jansma, Martijn de Koning, and Durk Hak, 145–64. Delft: Eburon Uitgeverij.
2011. ‘Following the Salafi Manhaj in Computer-Mediated Environments: Linking Everday Life to the Qur’an and the Sunna’. In The Transmission and Dynamics of the Textual Sources of Islam. Essays in Honour of Harald Motzki, edited by Nicolet Boekhoff-van der Voort, Kees Versteegh, and Joas Wagemakers, 421–41. Leiden & Boston: Brill.
2011. ‘Muslims on the Path of the Salaf Al-Salih. Ritual Dynamics in Chat Rooms and Discussion Forums’. Information, Communication & Society 14 (8): 1181–1203.
2009. ‘Zurück zum Quellcode: Salafistische Wissenspraktiken im Internet’. INAMO, no. 57: 37–42.
2009. ‘“Gaining Knowledge” – Salafi Activism in German and Dutch Online Forums’. Masaryk University Journal of Law and Technology 3 (1): 79–98.
2009. ‘Identitäten in translokalen Räumen: Islam in der arabischen Öffentlichkeit’. In Der Nahe Osten im Umbruch, edited by Martin Beck, Cilja Harders, Annette Jünemann, and Stephan Stetter, 277–98. Wiesbaden: VS-Verlag.
2008. ‘Terug naar de broncode. Salafistische internetforums in Nederland en Duitsland’. ZemZem 4 (2): 103–10.
2007. ‘Syrien’. In Die arabischen Staaten. Geschichte, Politik, Religion, Gesellschaft und Wirtschaft, edited by Walter Weiss, 316–33. Heidelberg: Palmyra Verlag.
2007. ‘War on Terror. Stimmen aus der arabischen Öffentlichkeit’. Wissenschaft & Frieden 25 (February): 22–25.
2006. ‘Strategies of Power Consolidation under Bashar Al-Asad: Modernizing Control over Resources’. Arab Studies Journal 14 (1): 65–91.
2004. ‘Auf dem Frühling folgt der Winter. Die syrische Zivilgesellschaft’. INAMO, no. 40 (Winter): 10–12.
2004. ‘Syrien unter Bashar Al-Asad. Strukturen und Herausforderungen’. INAMO, no. 40 (Winter): 4–9. (mit André Bank)
