S., Bulgantamir. 2023. “Орчин цагийн монгол хэлний [u ʊ], франц хэлний [y U] авианы туршилт авиазүйн судалгаа: Experimental Phonetic Analysis of the Vowel [ʊ, Y, U] in 1st Syllable in Modern Mongolian and French”. Mongolian Journal of Foreign Languages and Cultures 19 (430):18-24. https://doi.org/10.22353/MJFLC2015105.