↑Campbell, Lyle; Mixco, Mauricio (2007), 〈Korean, A language isolate〉, 《A Glossary of Historical Linguistics》, University of Utah Press, 7, 90–91쪽, most specialists... no longer believe that the... Altaic groups... are related […] Korean is often said to belong with the Altaic hypothesis, often also with Japanese, though this is not widely supported.
↑Dalby, David (1999–2000), 《The Register of the World's Languages and Speech Communities》, Linguasphere Press.
↑Kim, Nam-Kil (1992), 〈Korean〉, 《International Encyclopedia of Linguistics》 2, 282–86쪽, scholars have tried to establish genetic relationships between Korean and other languages and major language families, but with little success.
↑Róna-Tas, András (1998), 〈The Reconstruction of Proto-Turkic and the Genetic Question〉, 《The Turkic Languages》, Routledge, 67–80쪽, [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.
↑Schönig, Claus (2003), 〈Turko-Mongolic Relations〉, 《The Mongolic Languages》, Routledge, 403–19쪽, the 'Altaic' languages do not seem to share a common basic vocabulary of the type normally present in cases of genetic relationship.
↑Young Kyun Oh, 2005. Old Chinese and Old Sino-Korean
↑Juha Janhunen, 1996. Manchuria: an ethnic history