Byzantium in the near east : its relations with the seljuk sultanate of rum in Asia Minor the Armenians of Cilicia and the Mongols, A.D. c. 1192-1237 - Σαββίδης, Αλέξης Γ. Κ., 1955- (Βυζαντινά κείμενα και μελέται, 1981)