"iura", in Charles du Fresne du Cange’sGlossarium Mediæ et Infimæ Latinitatis (augmented edition with additions by D. P. Carpenterius, Adelungius and others, edited by Léopold Favre, 1883–1887)
“iura”, inHarry Thurston Peck, editor (1898),Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers