1. Morton Kaplan, System and Process in International Politics, New York, 1957.
2. W. T. R. Fox, The Super Powers: The United States, Britain and the Soviet Union — Their Responsibility for Peace, New York, 1944.
3. Ernst Haas, The Uniting of Europe, Stanford, 1958, 2nd edn, 1968.
4. Stanley Hoffmann, ‘Discord in Community: The North Atlantic Area as a Partial International System’, in International Organization, vol. 17 (1963), pp. 521–49.
5. Leonard Binder, ‘The New States in International Affairs’, in Robert Goldwin (ed.), Beyond the Cold War, Chicago 1965, pp. 195–216.