Michael Gagarin, Antiphon the Athenian, 2002, U. of Texas Press. Argues for the identification of Antiphon the Sophist and Antiphon of Rhamnus.
Gerard Pendrick, Antiphon the Sophist: The Fragments, 2002, Cambridge U. Press. Argues that Antiphon the Sophist and Antiphon of Rhamnus are two, and provides a new edition of and commentary on the fragments attributed to the Sophist.