TY - CHAP TI - Byzantium’s Eastern Frontier in the tenth and eleventh centuries T2 - Medieval frontiers: concepts and practices AU - Holmes, Catherine A2 - Abulafia, David A2 - Berend, Nora PB - Ashgate PY - 2002 CY - Aldershot CY - Burlington, VT EP - 104 SP - 83 SN - 0754605221 U3 - b1417833 ER -