[Agora Publication Page] Agora 1, s. 12, p. xii

Delbrück, Richard, Antike Porträts (Tabulae in usum scholarum, editae sub cura Iohannis Lietzmann, VI). Bonn, 1912. Delbrück, Richard, Die Münzbildnisse von Maximinus bis Carinus (Herrscherbild, III 2) ... Agora 1 xii ... Antal Hekler, Greek and Roman Portraits. ... Hinks, Roger Packman, Greek and Roman Portrait Sculpture. London, British Museum, 1935