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• Fiction 2
• Ethnography 4
• Proto-Bulgarians, Bulgaria 42
• Volga Bulgars, Tatars 13
• Slavs 22
• Scythia. Sarmatians, Huns 11
• Central and Middle Asia 12
• Thracia, the Balkans 29
• Caucasus 4

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• web book 45
• e-book 3
• news article 12
• gallery 6
• article 71
• journal, compilation 2

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• Bulgarian 20
• English 62
• Russian 39
• French 2
• German 10
• Macedonian 1
• Serbian 2
• Greek 1
• Romanian 1
• Italian 1