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] - Leszka, Mirosław; Cecota, Błażej (Balcanica Posnaniensia. Acta et studia, 2016)