WANEK, N.-M. Der Traktat des Akakios Chalkeopulos zum Byzantinischen Kirchengesang: By Gerda Wolfram (ed.). Journal of the International Society for Orthodox Music, [S. l.], v. 5, n. 1, p. 59–61, 2021. Disponível em: https://journal.fi/jisocm/article/view/108016. Acesso em: 19 jan. 2022.