Kostova, R. `Bypassing Anchialos`: The Black Sea coast in naval campaigns 11th to 12th c. (I). София: Унив. изд. Св. Климент Охридски, 2006 p. 579-596,.
Kostova, R. `Bypassing Anchialos`: The Black Sea coast in naval campaigns 11th to 12th c. (I). София: Унив. изд. Св. Климент Охридски, 2006 p. 579-596,.
Kostova, R. (2006) `Bypassing Anchialos`: The Black Sea coast in naval campaigns 11th to 12th c. (I), София: Унив. изд. Св. Климент Охридски p. 579-596,.
Kostova, R. (2006). `Bypassing Anchialos`: The Black Sea coast in naval campaigns 11th to 12th c. (I). София: Унив. изд. Св. Климент Охридски, p. 579-596.
Kostova R. `Bypassing Anchialos`: The Black Sea coast in naval campaigns 11th to 12th c. (I). София: Унив. изд. Св. Климент Охридски; 2006. p. p. 579-596.
