Balbuza, Katarzyna. “AETERNUS AUGUSTUS IN THE IMPERIAL TITULATURE OF THE LATE III AND IV CENTURY A.D”. Gniezno European Studies 16, no. 16 (December 15, 2017): 103–127. Accessed September 27, 2024. https://pressto.amu.edu.pl/index.php/seg/article/view/30058.