“A Survey of “interrogation marks” in the Major Manuscripts of Plato’s Republic” a circular attached to 7. “The Origin of Interrogation Marks in the Medieval Manuscripts of Plato’s Republic and Its Significance in the Tradition of Plato’s Dialogues” (Proceedings of the IX Symposium Platonicum, 2 vols with a supplementary volume, 2010, I 205-210)