The Vienna Colloquium - An article on the History of Economic Thought site on this branch of mathematical economists centered around Karl Menger. - http://cepa.newschool.edu/het/schools/vienna.htm
The Political Origins of Neoclassical Economics - A dissertation proposal that offers a critical approach to the origins of Neoclassical economics. - http://www.eco.utexas.edu/Homepages/faculty/Cleaver/chipprop.html
Neoclassical economics - Article from the open source Wikipedia. - http://en.wikipedia.org/wiki/Neoclassical_economics
The Lausanne School - A profile of the Walrasians who developed the general equilibrium theory. - http://cepa.newschool.edu/het/schools/lausanne.htm
The Cambridge Neoclassicals - An article on the "Marshallians" from the History of Economic Thought site with bibliography and web links. - http://cepa.newschool.edu/het/schools/english.htm
Neoclassical Economics - Article in the Concise Encyclopedia of Economics by E. Roy Weintraub. - http://www.econlib.org/library/Enc/NeoclassicalEconomics.html