1. J. P. Ancot, ed.,Analysing the Structure of Econometric Models, The Hague: Martinus Nijhoff, 1984.
2. L. Bassett, J. Maybee, and J. Quirk, “Qualitative Economics and the Scope of the Correspondence Principle,”Econometrica, 36, 1968, pp. 544–53.
3. F. Brouwer, P. Nijkamp, and H. Voogd, “Mixed Qualitative Calculus and Economic Modeling,” Research Memorandum, Economic Faculty, Free University Amsterdam, 1984.
4. M. Gilli, “Analysis of Static and Dynamic Structures in Economic Models: Methodological and Practical Aspects,”Applied Mathematical Modelling, 5, 1981, pp. 84–8.
5. H. J. Greenberg, and J. S. Maybee, eds.,Computer-Assisted Analysis and Model Simplification, New York: Academic Press, 1981.