THEOTOKIS, G. 2012. Rus, Varangian and Frankish mercenaries in the service of the Byzantine Emperors (9th-11th c.): Numbers, Organisation and Battle Tactics in the operational theatres of Asia Minor and the Balkans. Byzantina Symmeikta. 22, (Dec. 2012), 125–156. DOI:https://doi.org/10.12681/byzsym.1039.