Sorensen, Georg. "A State is not a State: Types of Statehood and Patterns of Conflict after the Cold War." In International Security Management and the United Nations. New York: United Nations University Press, 1999.

Holm, Hans-Henrik, and Georg Sorensen. "International Relations Theory in a World of Variation." In Whose World Order? Uneven Globalization and the End of the Cold War, 204. Boulder, CO: Westview Press, 1995.