It is worth pointing out that in this particular study our authors have abandoned demand and supply functions as a tool for analysis, even as applied to individuals... [The problem] has been reformulated as one of proving that a number of maximizations of individual goals under interdependent restraints can be simultaneously carried out.

p. 60, as cited in: Mitra-Kahn, Benjamin H. "General Equilibrium Theory, its history and its relation (if any) to the Market Economy." (2005). - Three Essays (1957)