Benhabib, Seyla. "The Critique of Functionalist Reason." In Critique, Norm, and Utopia, 224-278. New York: Columbia University Press, 1986.

From the American Political Science Review (about Critique, Norm, and Utopia):

Displaying an impressive command of complex materials, Seyla Benhabib reconstructs the history of theories from a systematic point of view and examines the origins and transformations of the concept of critique from the works of Hegel to Habermas. Through investigating the model of the philosophy of the subject, she pursues the question of how Hegel´s critiques might be useful for reforumulating the foundations of critical social theory

Online:
Google Books