Reichberg, Gregory M.; Vesselin Popovski & Nicholas Turner (2009) Norms of War in Cross-Religious Perspective, in Popovski, Vesselin; & Gregory M. Reichberg, eds, World Religions and Norms of War. Tokyo: (303–315).
Reichberg, Gregory M.; Vesselin Popovski; & Nicholas Turner, eds, (2009) World Religions and Norms of War. Tokyo, New York, Paris: United Nations University Press.
The Peace Research Institute Oslo (PRIO) conducts research on the conditions for peaceful relations between states, groups and people.