Sofia 1999. Bulgarian historical review (2005), United Center for Research and Training in History, Published by Pub. House of the Bulgarian Academy of Sciences, v. 33: no. 1–4. Gjuzelev, V., (1988) Medieval Bulgaria, Byzantine Empire, Black Sea, Venice, Genoa (Centre culturel du monde byzantin). Published by Verlag Baier. Nikolov, A. Making a new basileus: the case of Symeon of Bulgaria (893–927) reconsidered. – In: Rome, Constantinople and Newly converted Europe. Archeological and Historical Evidence. Vol. I. Ed. by M. Salamon, M. Wołoszyn, A. Musin, P. Špehar. Kraków-Leipzig-Rzeszów-Warszawa, 2012, 101–108 Николов, А., Факти и догадки за събора през 893 година. – В: България в световното културно наследство. Материали от Третата национална конференция по история, археология и културен туризъм "Пътуване към България" - Шумен, 17–19. 05. 2012 г. Съст. Т. Тодоров. Шумен, 2014, 229–237 Resources Bulgarian history – Boris I The Ecumenical Patriarchate of Constantinople 9th-century births 907 deaths 9th-century Christian saints 9th-century Bulgarian monarchs Bulgarian people of the Byzantine–Bulgarian Wars Christianity in medieval Macedonia Christian royal saints Medieval Bulgarian saints Krum's dynasty Turkic rulers Year of birth unknown