Diamond, Arthur M. “F.A. Hayek on Constructivism and Ethics.” The Journal of Libertarian Studies 4, no. 4 (Fall 1980): 353–366.

Excerpt:

“Long before receiving his Nobel Prize, Hayek was well respected in the academic community. Keynes had glowing praise for Hayek’s The Road to Serfdom. Milton Friedman and Paul Samuelson, antagonists on many issues, agree that Hayek’s 1945 “The Use of Knowledge in Society” was a major contribution to political-economic thought.”

Online:
Journal of Libertarian Studies [pdf]