1. L. Walras, Elements of Economic Politique Pure, 1st Edition, Lausanne:F. Rouge; English translation, William Jaffe, 1954, Elements of Pure Economics, London: Allen and Unwin (1874)
2. A. Marshall, Principles of Economics (MacMillan, London, 1890)
3. J. Robinson, The Economics of Imperfect Competition (Macmillan, London, 1933)
4. G. Bonanno, Monopoly Equilbria and Catastrophe Theory. Aust. Econ. Pap. 26, 197–215 (1987)
5. V. Pareto, Manual of Economie Politique (Girard et Briere, Paris, 1909)