H. Kelsen, Principles of International Law (New York: Rinehart, 1952)

J.L. Brierly, The Laws of Nations, 6th ed. (edited by Sir Humphrey Waldock, Oxford: Clarendon, 1963)

E. Jimenez de Aréchaga, International Law in the Past Third of a Century, 159 HR (1978-I), 1-334

O. Schachter, International Law in Theory and Practice (Dordrecht: Nijoff, 1991)

M. Bedjaoui (ed.), International Law: Achievements and Prospects (Dordrecht: Nijhoff, 1991)

Sir Robert Jennings and Sir Arthur Watts, Oppenheim’s International Law, vol. I, 9th ed. (London: Longman, 1992)

R. Higgins, Problems and Process. International Law and How We Use It (Oxford: Clarendon, 1994)

M.N. Shaw, International Law, 4th ed. (Cambridge: Cambridge University Press, 1997)

I. Brownlie, Principles of Public International Law, 5th ed. (Oxford: Clarendon Press, 1998)