Leszka, Mirosław, and Błażej Cecota. “Aleksandru Madgearu, Byzantine Military Organization on the Danube, 10th–12th Centuries, Brill, Leiden-Boston 2013, Ss. 212 [= East Central and Eastern Europe in the Middle Ages, 450–1450, Vol. 22]”. Balcanica Posnaniensia. Acta et studia 22, no. 2 (March 8, 2016): 230-234. Accessed June 30, 2022. https://pressto.amu.edu.pl/index.php/bp/article/view/5118.