Nuorluoto, Juhani, (Ed.) (2006). "The «Northwestern» group of Finno-Ugric languages and its heritage in the place names and substratum vocabulary of the Russian North". The Slavicization of the Russian North (Slavica Helsingiensia 27)(PDF). Helsinki: Department of Slavonic and Baltic Languages and Literatures. ss. 109-127. ISBN978-952-10-2852-6. 30 Ağustos 2017 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 26 Mart 2022.
Nuorluoto, Juhani, (Ed.) (2006). "The «Northwestern» group of Finno-Ugric languages and its heritage in the place names and substratum vocabulary of the Russian North". The Slavicization of the Russian North (Slavica Helsingiensia 27)(PDF). Helsinki: Department of Slavonic and Baltic Languages and Literatures. ss. 109-127. ISBN978-952-10-2852-6. 30 Ağustos 2017 tarihinde kaynağından arşivlendi(PDF). Erişim tarihi: 26 Mart 2022.