Benoit, Emile.The monetary and real costs of national defense, American Economic Review, 1968, 58, 398-416.
2.
Catlin, G.E.C.Systematic Politics. Toronto: University of Toronto Press, 1962.
3.
Davis, Kingsley.The demographic foundations of national power. In Freedom and Control in Modern Society. New York: Van Nostrand, 1954.
4.
Organski, A.F.K.World Politics. New York, 1958 .
5.
Organski, Katherine, and A.F.K. Organski .Population and World Power. New York: Knopf, 1961.
6.
Ransom, Harry Howe.International relations, Journal of Politics, 1968, 30, 345-71.
7.
Russett, Bruce M. In J. David Singer (ed.), Quantitative International Politics: Insights and Evidence. New York : Free Press, 1967.
8.
Schwartzman, Simon, and Manuel Mora y Araujo .Images of international stratification in Latin America, Journal of Peace Research, 1966, 3.
9.
Sullivan, Dennis G.Towards an inventory of basic propositions in contemporary textbooks in international relations. Doctoral dissertation, Northwestern University , 1963.