LESZKA, Mirosław J. The Monk versus the Philosopher: From the History of the Bulgarian-Byzantine War 894-896. Studia Ceranea, Poland, v. 1, p. 55–70, 2011. DOI: 10.18778/2084-140X.01.04. Disponível em: https://www.czasopisma.uni.lodz.pl/sceranea/article/view/5520. Acesso em: 25 oct. 2026.