| Conceptualizing state counterterrorism O Lewis The Palgrave handbook of global counterterrorism policy, 3-37, 2017 | 24 | 2017 |
| Conceptualizing Counterterrorism O Lewis Insurgency and Counterinsurgency in Modern War, 1-16, 2016 | 6 | 2016 |
| Security Cooperation between Western States: Openness, Security and Autonomy O Lewis Routledge, 2023 | 4 | 2023 |
| Conceptualizing non-state counter-terrorism O Lewis Counter-terrorism and civil society, 32-46, 2021 | 1 | 2021 |
| Trilemma Tradeoffs in International Relations: An Analytical Framework O Lewis Global Studies Quarterly 4 (1), 2024 | | 2024 |
| Revolutionary Armed Forces of Colombia: People's Army (Fuerzas Armadas Revolucionarias de Colombia–Ejército del Pueblo, FARC-EP) D Flórez, O Lewis Handbook of Terrorist and Insurgent Groups: A Global Survey of Threats …, 2024 | | 2024 |
| Conceptualising Insurgency O Lewis, SN Romaniuk Handbook of Terrorist and Insurgent Groups, 7-12, 2024 | | 2024 |
| Small state influence in EU security policy-making: PESCO, Frontex and the integration dilemma B Dominici, O Lewis, S Steingass Small States in EU Policy-Making: Strategies, Challenges, Opportunities, 143-158, 2024 | | 2024 |
| Explaining military, law enforcement and intelligence cooperation between Western states ORTD Lewis University of St Andrews, 2018 | | 2018 |
| Terrorism: Looking through the Definitional Kaleidoscope SN Romaniuk, O Lewis Handbook of Terrorist and Insurgent Groups, 37-45, 0 | | |
Sebastian SteingassCollege of Europe in Natolin在 steingass.eu 的电子邮件经过验证
Sebastian SteingassCollege of Europe in Natolin在 steingass.eu 的电子邮件经过验证