Roberts, Benjamin W. и др. Development of metallurgy in Eurasia // Antiquity 83 (322). Department of Prehistory and Europe, Британски музей, 2009. DOI:10.1017/S0003598X00099312. с. 1015. Посетен на 1 март 2020. In contrast, the earliest exploitation and working of gold occurs in the Balkans during the mid-fifth millennium BC, several centuries after the earliest known copper smelting. This is demonstrated most spectacularly in the various objects adorning the burials at Varna, Bulgaria (Renfrew 1986; Highamet al. 2007). In contrast, the earliest gold objects found in Southwest Asia date only to the beginning of the fourth millennium BC as at Nahal Qanah in Israel (Golden 2009), suggesting that gold exploitation may have been a Southeast European invention, albeit a short-lived one.
Bulgar // Encyclopædia Britannica. Посетен на 1 март 2020.
Bulgaria // Encyclopædia Britannica. Encyclopædia Britannica Online, 2010. Посетен на 17 март 2010. The Bulgarian nobility was destroyed—its members either perished, fled, or accepted Islam and Turkicization—and the peasantry was enserfed to Turkish masters.
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Tillier, Anne-Marie и др. Evidence of Neanderthals in the Balkans: The infant radius from Kozarnika Cave (Bulgaria) // Journal of Human Evolution 111 (111). Октомври 2017. DOI:10.1016/j.jhevol.2017.06.002. с. 54 – 62.
Roberts, Benjamin W. и др. Development of metallurgy in Eurasia // Antiquity 83 (322). Department of Prehistory and Europe, Британски музей, 2009. DOI:10.1017/S0003598X00099312. с. 1015. Посетен на 1 март 2020. In contrast, the earliest exploitation and working of gold occurs in the Balkans during the mid-fifth millennium BC, several centuries after the earliest known copper smelting. This is demonstrated most spectacularly in the various objects adorning the burials at Varna, Bulgaria (Renfrew 1986; Highamet al. 2007). In contrast, the earliest gold objects found in Southwest Asia date only to the beginning of the fourth millennium BC as at Nahal Qanah in Israel (Golden 2009), suggesting that gold exploitation may have been a Southeast European invention, albeit a short-lived one.
Georgieva, Lidia и др. Bulgaria Health system review // Health Systems in Transition 9 (1). European observatory on health systems and policies, 2007. с. xvi, 1, 2, 3, 12. Архивиран от оригинала на 2022-10-09.
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Georgieva, Lidia и др. Bulgaria Health system review // Health Systems in Transition 9 (1). European observatory on health systems and policies, 2007. с. xvi, 1, 2, 3, 12. Архивиран от оригинала на 2022-10-09.
