VOLKMANN, Jean-Charles. Bien connaître les généalogies des rois de France. Paris: Editions J.-P. Gisserot, 1997. Dostupné online. ISBN2-87747-208-6. (francouzsky)
FRASSETTO, Michael. The Early Medieval World: From the Fall of Rome to the Time of Charlemagne [2 Volumes]. [s.l.]: ABC-CLIO Dostupné online. ISBN978-1-59884-996-7. S.489. (anglicky)
PADOA-SCHIOPPA, Antonio. A History of Law in Europe: From the Early Middle Ages to the Twentieth Century. [s.l.]: Cambridge University Press Dostupné online. ISBN978-1-107-18069-7. (anglicky)
BEYERLE, Franz; ROTHARI (REX LANGOBARDORUM.); GRIMOALD (REX LANGOBARDORUM.). Edictus Rothari. [s.l.]: Historisches Institut des Werralandes, 1962. Dostupné online. (latinsky)