Catalogue of the late Byzantine coins, 1081-1453 : Byzantine Imperial coinage from Alexius I to Alexius IV (1081-1204) : Issac of Cyprus, Bulgarian and imitative coinage, Despotate of Thesallonica, Despotate of Epirus - Marchev, Valentin; Wachter, Robert (Published privately by V. Marchev and R. Wachter, 2011)