T. Kamusella. The Politics of Language and Nationalism in Modern Central Europe. Palgrave Macmillan UK, 16 December 2008 — 164–165 bet. ISBN 978-0-230-58347-4."In order to emphasize the difference between Poland-Lithuaniaʼs Ruthenian and Russiaʼs Russian, throughout the 18th century the official name of the Russian language was rossiiskii before being replaced through the adoption of the adjective russkii during the first decades of the 19th century."
