On the Development of a Consistent Classification System for Octoechos Manuscripts. Bulletin of the Ekaterinburg Theological Seminary, [S. l.], n. 55, p. 90–119, 2026. DOI: 10.24412/2224-5391-2026-55-90-119. Disponível em: https://journals.epds.ru/index.php/VEDS/article/view/85. Acesso em: 10 nov. 2026.