Atwill, Janet M. Rhetoric Reclaimed: Aristotle and the Liberal Arts Tradition. Cornell UP, 1998. Chapter 7.
Gage, John T. Review of Rhetorical Traditions and the Teaching of Writing by C. H. Knoblauch, Lil Brannon. Rhetoric Review, Vol. 3, No. 1 (Sep., 1984), pp. 100-105.
Gage, John T. “An Adequate Epistemology for Composition: Classical and Modern Perspectives.” In Essays on Classical Rhetoric and Modern Discourse, ed. Robert J. Connors, Lisa S. Ede, and Andrea A. Lunsford, 152-69, 281-84. Carbondale: Southern Illinois University Press, 1984.
Haskins, Ekaterina V., “Endoxa, Epistemological Optimism, and Aristotle’s Rhetorical Project.” Philosophy and Rhetoric 37.1 (2004). (got copy off of Project Muse)
Lunsford, Andrea, and Lisa Ede. “On Distinction between Classical and Modern Rhetoric” (see Schroeder)
Schroeder, John. “On Rhetoric-as-Epistemic: Has the Discussion Died” http://www.engl.niu.edu/wac/schrepis.html