Bjorn Wiemer, Dialect and language contacts on the territory of the Grand Duchy from the 15th century until 1939, Kurt Braunmüller, Gisella Ferraresi, Aspects of multilingualism in European language history, John Benjamins Publishing Company, 2003, ISBN 90-272-1922-2, Google Print, p.109-114
Piotr Eberhardt, Jan Owsinski, Ethnic Groups and Population Changes in Twentieth-Century Central-Eastern Europe: History, Data, Analysis, M.E. Sharpe, 2003, ISBN 0-7656-0665-8, Google Print, p.177.
Bjorn Wiemer (2003). «Dialect and language contacts on the territory of the Grand Duchy from the 15th century until 1939». Στο: Kurt Braunmüller· Gisella Ferraresi, επιμ. Aspects of Multilingualism in European Language History. John Benjamins Publishing. σελίδες 109; 125. ISBN90-272-1922-2. Ανακτήθηκε στις 22 Φεβρουαρίου 2016.
Jarmo Kotilaine, Russia's foreign trade and economic expansion in the seventeenth century: windows on the world, BRILL, 2005, ISBN 90-04-13896-X, Google Print, p.45
