The pictorial sources of the illustrations of the Books of Kings, Proverbs, Judith and Maccabees in the Carolingian Bible of San Paolo fuori le mura in Rome. - Gaehde, J.E (Frühmittelalterliche Studien. Jahrbuch des Instituts für Frühmittelalterforschung der Universität Münster, 9.1975, 1975)