^Butler, Samuel; Rhys, Ernest (1907). "Map 4, Gallia". The Atlas of Ancient and Classical Geography. Everyman. London; New York: J.M. Dent; E.P. Dutton.
^Schön, Franz (Regensburg) (2006-10-01), "Sequani", Brill’s New Pauly (engelsk), Brill, hentet 2023-12-16