Vollhardt, J.R., Jeong, H.*, & Bilali, R. (2022). Reconciliation in the aftermath of collective violence. In D. Osborne & C. Sibley (Eds.), The Cambridge Handbook of Political Psychology. Cambridge University Press.

Penić, S., Vollhardt, J.R., & Reicher, S. (2021). Reconciliation versus justice? It depends on the context: The role of symmetric and asymmetric violence in predicting post-conflict attitudes. Social Psychological and Personality Science, 12(2), 202-212.

Cohrs, J.C., Vollhardt, J.R., & McKeown Jones, S. (2018). Intergroup conflict, peace and reconciliation. In C.J. Hewer & E. Lyons (Eds.), Political psychology: A social psychological approach. Oxford: BPS Wiley.

Schroer-Hippel, M., Cohrs, J.C., & Vollhardt, J. R. (2018). Sozialpsychologische Friedens- und Konfliktforschung [Social psychological peace and conflict studies]. In O. Decker (Ed.), Sozialpsychologie und Sozialtheorie. [Social psychology and social theory]. Wiesbaden, Germany: Springer VS-Verlag.

Vollhardt, J.R., & Twali, M. S. (2016). Emotion-based reconciliation requires attention to power differences, critical consciousness, and structural change. Psychological Inquiry, 27, 136-143.  

Campbell, M., & Vollhardt, J.R. (2014). Fighting the good fight: The relationship between belief in evil and support for violent policies. Personality and Social Psychology Bulletin, 40, 16-33.

Vollhardt, J.R., & Cohrs, J.C. (2013). Aktuelle Sozialpsychologische Beitrӓge zur Friedens- und Konfliktforschung [Current social psychological contributions to Peace and Conflict Studies]. Zeitschrift für Friedens- und Konfliktforschung [Journal of Peace and Conflict Studies], 2, 246-277.

Groeben, N. & Vollhardt, J.R. (2012). Friedenspsychologie als zielorientierte Praxisforschung. Eine metatheoretisch-methodologische Kritik. [Peace psychology as goal-oriented, practice-focused research. A meta-theoretical methodological critique.] In W. Baros & J. Rost (Eds.), Natur- und kulturwissenschaftliche Perspektiven in der Psychologie. Methodologie – Methoden – Anwendungsbeispiele [Natural and cultural science perspectives in psychology. Methodology – methods – application examples] (pp. 17-27). Berlin, Germany: Verlag irina regener.

Vollhardt, J. R. (2012). Social psychological peace research. In D. J. Christie (Ed.), Encyclopedia of Peace Psychology (pp. 1037-1041). Hoboken, NJ: Wiley-Blackwell.

Vollhardt, J. R. (2012). Tolerance for diverse groups. In D. J. Christie (Ed.), Encyclopedia of Peace Psychology (pp. 1117-1121). Hoboken, NJ: Wiley-Blackwell.

Shapiro, I., Bilali, R., & Vollhardt, J. (2009). Peace. In S. J. Lopez (Ed.), The encyclopedia of positive psychology, Vol. 2 (pp. 672-676). Oxford, UK: Wiley-Blackwell.

Vollhardt, J., & Migacheva, K., & Tropp, L. (2008). Social cohesion and tolerance for group differences. In J. de Rivera (Ed.), Handbook on building cultures of peace (pp. 139-152). Berlin, New York: Springer.

Vollhardt, J., & Bilali, R. (2008). Social psychology’s contribution to the psychological study of peace: A review. Social Psychology, 39, 12-25.