Vyzantio kai Voulgaroi (1018-1185) = Byzantium and the Bulgarians (1018-1185) - Nikolaou, Katerina; Tsiknakēs, Kōstas G. (National Hellenic Research Foundation. Institute for Byzantine Research, ISSN 1106-1448, 2008)
Keywords: Bulgaria : History : 1018-1185 : Congresses; Byzantine Empire : History : 1025-1081 : Congresses; Byzantine Empire : History : Comneni dynasty, 1081-1185 : Congresses