vgl. Domitian's Perpetual Censorship and the Numismatic Evidence (T. V. Buttrey) - in Teilansicht; vcoins.com: censor perpetuus ("This coin shows the rare appearance of the full imperial title "Censor Perpetuus." While earlier emperors had held this office, Domitian was the first to take it "in perpetuity," an extravagant act notably advertised on this coin.")
persee.fr
Roland Barthes: L’ancienne rhétorique, Communications, 16, 1970, Recherches rhétoriques, S. 187
vcoins.com
vgl. Domitian's Perpetual Censorship and the Numismatic Evidence (T. V. Buttrey) - in Teilansicht; vcoins.com: censor perpetuus ("This coin shows the rare appearance of the full imperial title "Censor Perpetuus." While earlier emperors had held this office, Domitian was the first to take it "in perpetuity," an extravagant act notably advertised on this coin.")