Galtung, Johan : 'A Structural Theory of Aggression', Journal of Peace Research, Vol. 2, 1964, pp. 15-38.
2.
Rummel, R.J. : 'A Foreign Conflict Code Sheet', World Politics, March 1966a.
3.
— 'The Dimensionality of Nations Project', in Merritt, Richard and Stein Rokkan: Comparing Nations (New Haven: Yale University Press, 1966) pp. 109-129.
4.
RUMMEL, R. J., JACK SAWYER, HAROLD GUEZKOW, and RAYMOND TANTER: Dimensions of Nations (forthcoming, 1967).