NIKOLAOU, Anastasia. Byzantine and Post-Byzantine Canons of the Matins in Honour of Saints Constantine and Helena. Studia Ceranea, Poland, v. 15, p. 433–477, 2025. DOI: 10.18778/2084-140X.15.06. Disponível em: https://czasopisma.uni.lodz.pl/sceranea/article/view/24633. Acesso em: 8 aug. 2026.