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• Fiction 2
• Ethnography 4
• Proto-Bulgarians, Bulgaria 44
• Volga Bulgars, Tatars 13
• Slavs 24
• Scythia. Sarmatians, Huns 11
• Central and Middle Asia 12
• Thracia, the Balkans 30
• Caucasus 4

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• web book 48
• e-book 3
• news article 12
• gallery 6
• article 73
• journal, compilation 2

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• Bulgarian 21
• English 62
• Russian 42
• French 2
• German 10
• Macedonian 1
• Serbian 3
• Greek 1
• Romanian 1
• Italian 1