University of Helsinki
For the full list of publications, presentations and other activities, see the TUHAT database.
Journal articles
“‘What is this ISIS all about?’ Addressing violent extremism with students: Finnish educators’ perspectives.” European Educational Research Journal 21 (2022), no. 5. Together with Katja Vallinkoski & Pia Koirikivi.
“We Have All Been Warned: Public Debate on the Capitol Attack in Finland and Sweden.” Terrorism and Political Violence 33 no. 5 (2021).
“Learning from the Lack of Political Violence: Conceptual Issues and Research Designs.” Perspectives on Terrorism 14 no. 6 (2020).
“Amok – private oder politische Gewalt? School Shootings und die Gernzen der Einzeltäterthese (Political or personal? School rampage shootings and the search for the boundaries of lone actor terrorism).” Mittelweg 36 no. 4-5 (2020).
“To Call or Not to Call It Terrorism: Public Debate on Ideologically-Motivated Acts of Violence in Finland, 1991-2015.” Terrorism and Political Violence 30 no. 5 (2018). Together with Daniel Sallamaa.
“Terrorism and political violence in the Nordic countries.” Terrorism and Political Violence 30 no. 5 (2018). Together with Mats Fridlund & Daniel Sallamaa.
“International pressure to perform: Counterterrorism policy development in Finland“, Studies in Conflict and Terrorism 39, no. 4 (2016).
“Political elements in post-Columbine school shootings in Europe and the United States.” Terrorism and Political Violence 26, no. 1 (2014).
“Killing it softly? Explaining the early demise of left-wing terrorism in the Netherlands.” Terrorism and Political Violence 22, no. 4 (2010), with Beatrice de Graaf.
“Survival on a shoestring: The Symbionese Liberation Army revisited.” Critical Studies on Terrorism 3, no. 2 (2010).
“Apocalypse – not in Finland. Millenarianism and expectations on the eve of the year 2000.” Terrorism and Political Violence 14, no. 1 (2002).
Book chapters
“Before ‘radicalisation’: Explaining individual involvement in terrorism before the popularization of the radicalization concept”, in Joel Busher, Leena Malkki & Sarah Marsden (eds.), Routledge Handbook of Radicalisation and Countering Radicalisation (London & New York: Routledge, accepted for publication, forthcoming in 2023).
“Ethnocultural and racial ambiguities of national socialist state-building: Finland and the Nordic Resistance Movement”, in Nicola Karcher & Markus Lundström (eds.), Nordic Fascism: Fragments of an Entangled History (Routledge, 2022), with Daniel Sallamaa.
“Longevity of terrorist groups”, in Diego Muro & Tim Wilson (eds.), Contemporary Terrorism Studies (Oxford University Press, 2022).
“Trawling and trolling for terrorists in the digital Gulf of Bothnia: Cross-lingual text mining for the emergence of terrorism in Swedish and Finnish newspapers, 1780—1926.” CLARIN ERIC (2022). Together with Mats Fridlund, Daniel Brodén, Tommi Jauhiainen, Leif Göran Olsson & Lars Borin.
“NO: The fallacy of the new terrorism thesis”, in Richard Jackson & Daniela Pisoiu (eds.): Contemporary Debates on Terrorism, Second Edition (Routledge, 2018), with Isabelle Duyvesteyn.
“Left-wing terrorism”, in Andrew Silke (ed.), Routledge Handbook of Terrorism and Counterterrorism (Routledge, 2018).
“End to Terrorism, Theories of”, in Fathali M. Moghaddam (ed.), The SAGE Encyclopedia of Political Behavior (SAGE Publications, 2017).
“School shootings and lone actor terrorism”, in Michael Fredholm (ed.), Understanding Lone Actor Terrorism: Past Experience, Future Outlook, and Response Strategies (Routledge, 2016).
“NO: the fallacy of the new terrorism thesis“, in Richard Jackson & Justin Sinclair, Contemporary Debates on Terrorism (London: Routledge, 2012), with Isabelle Duyvesteyn.
“Radicalisation and terrorism in history: Lessons from the radical left terrorist campaigns in Europe and the United States“, in Rik Coolsaet (ed.), Jihadi Terrorism and the Radicalisation Challenge: European and American Experiences (Ashgate, 2011).
Books, reports and edited volumes
Routledge Handbook of Radicalisation and Countering Radicalisation (London & New York: Routledge, 2024), edited together with Joel Busher & Sarah Marsden.
Extremist speech online and in the Finnish news media. Publications of the Government’s Analysis, Assessment and Research Activities 2021:72 (Finnish Government, 2021), with Daniel Sallamaa, Juha Saarinen and Sami Eerola.
Evolution of Jihadism in Finland. The International Centre for Counter-Terrorism – The Hague (2021), with Juha Saarinen.
Jihadism in Finland. Publications of the Ministry of the Interior 2019:31 (Ministry of the Interior, 2019), with Juha Saarinen.
Jihadist online communication and Finland, Publications of the Ministry of the Interior 2019:29 (Ministry of the Interior, 2019), with Matti Pohjonen.
How terrorist campaigns end: The Rode Jeugd in the Netherlands and the Symbionese Liberation Army in the United States. Ph. D. dissertation, Department of Political Science, University of Helsinki (2010). PDF / Summary
Vapauden, turvallisuuden ja oikeuden Eurooppa (Europe of Freedom, Security and Justice). Forum Iuris (Helsinki: University of Helsinki, Faculty of Law publications 2010), coedited with Kimmo Nuotio.