Abdula, Sevba, ed. n.d. “Bulgarian-Russian Relations After the Accession of Bulgaria to Nato in the Period From 2004 to 2024”. In The Balkans Politics, History and Society, Research 9:3-18. Editorial Publishings. Idefe Publications. Accessed June 19, 2025. https://doi.org/10.51331/EB06.01AK.