In 1548 in his New Testament Mikael Agricola mentions that Finnish tribes are Finns, Tavastians and Karelians. The same division can also be seen in typical brooches that women wore in the 12th to 14th centuries. However, the metal culture, especially jewelry and weapons, had already evolved into distinctive and peculiar in the end of the Merovingian period in 8th century in the area of contemporary Finland. The intention of this evolution was possibly to express specifically "Finnish" identity which was born from the image of common origin and mutual similarity.
- edited by Matti Saarnisto (2003). Karjalan synty. Viipurin läänin historia 1. Karjalan Kirjapaino Oy. pp. 346–347.CS1 maint: Extra text: authors list (link)
- "solki; hevosenkenkäsolki". www.finna.fi (in Finnish). Retrieved 2018-03-02.
- Tarkiainen, Kari (2010). Ruotsin itämaa. Svenska litteratursällskapet i Finland. p. 241.
- Georg Haggren, Petri Halinen, Mika Lavento, Sami Raninen ja Anna Wessman (2015). Muinaisuutemme jäljet. Gaudeamus. p. 339.CS1 maint: Multiple names: authors list (link)
- Georg Haggren, Petri Halinen, Mika Lavento, Sami Raninen ja Anna Wessman (2015). Muinaisuutemme jäljet. Gaudeamus. p. 269.CS1 maint: Multiple names: authors list (link)