Helimski, Eugene (2006). »The «Northwestern» group of Finno-Ugric languages and its heritage in the place names and substratum vocabulary of the Russian North«. V Nuorluoto, Juhani (ur.). The Slavicization of the Russian North (Slavica Helsingiensia 27)(PDF). Helsinki: Department of Slavonic and Baltic Languages and Literatures. str. 109–127. ISBN978-952-10-2852-6.
Aikio, Ante (2012). »An essay on Saami ethnolinguistic prehistory«(PDF). Mémoires de la Société Finno-Ougrienne. Helsinki, Finland: Finno-Ugrian Society. 266: 63–117. Pridobljeno 5. julija 2017.
Rahkonen, Pauli (2009), »The Linguistic Background of the Ancient Meshchera Tribe and Principal Areas of Settlement«, Finnisch-Ugrische Forschungen, 60, ISSN0355-1253
