Pawłowski, Dominik. “Walter E. Kaegi, Heraclius: Emperor of Byzantium, Cambridge University Press, New York 2003, Ss. 359, 6 il., 10 Map, ISBN 0-521-81459-6”. Balcanica Posnaniensia. Acta et studia 31 (December 17, 2024): 402–404. Accessed December 18, 2024. https://pressto.amu.edu.pl/index.php/bp/article/view/44808.