Knowledge AND Ignorance: Critique of Neoclassical Economics: A critique from a "heterodox" point of view.
Neoclassical Economics: Article in the Concise Encyclopedia of Economics by E. Roy Weintraub.
Neoclassical economics: Article from the open source Wikipedia.
The Cambridge Neoclassicals: An article on the "Marshallians" from the History of Economic Thought site with bibliography and web links.
The Lausanne School: A profile of the Walrasians who developed the general equilibrium theory.
The Political Origins of Neoclassical Economics: A dissertation proposal that offers a critical approach to the origins of Neoclassical economics.
The Vienna Colloquium: An article on the History of Economic Thought site on this branch of mathematical economists centered around Karl Menger.