"An extreme manifestation of nationalism and the family cult was the revival of interest in Tangun, the mythical founder of the first Korean state... Most textbooks and professional historians, however, treat him as a myth."
"Although Kija may have truly existed as a historical figure, Tangun is more problematical."
Song, Jae Jung (2005) «The Korean language: structure, use and context» Routledge, p. 15 Lyle Campbell & Mauricio Mixco. 2007. A Glossary of Historical Linguistics. University of Utah Press. («Korean, A language isolate», pg. 90; «Korean is often said to belong with the Altaic hypothesis, often also with Japanese, though this is not widely supported», pp. 90-91; «…most specialists…no longer believe that the…Altaic groups…are related», pg. 7) David Dalby. 1999/2000. The Linguasphere Register of the World’s Languages and Speech Communities. Linguasphere Press. Nam-Kil Kim. 1992. «Korean», International Encyclopedia of Linguistics. Volume 2, pp. 282—286. («…scholars have tried to establish genetic relationships between Korean and other languages and major language families, but with little success», pg. 282) András Róna-Tas. 1998. «The Reconstruction of Proto-Turkic and the Genetic Question», The Turkic Languages. Routledge. Pp. 67-80. («[Ramstedt’s comparisons of Korean and Altaic] have been heavily criticised in more recent studies, though the idea of a genetic relationship has not been totally abandoned», pg. 77.) Claus Schönig. 2003. «Turko-Mongolic Relations», The Mongolic Languages. Routledge. Pp. 403—419. («…the 'Altaic' languages do not seem to share a common basic vocabulary of the type normally present in cases of genetic relationship», pg. 403)
