Shchavelev, Aleksei. 2019. “Treatise ‘De Administrando Imperio’ by Emperor Constantine VII Porphyrogenitus: Date of the Paris. Gr. 2009 Copy, Years of Compiling of the Original Codex, and a Hypothesis about the Number of Authors”. Studia Ceranea 9 (December):681-704. https://doi.org/10.18778/2084-140X.09.33.