Durie, M.; Hajek, J., A revised standard phonemic orthography for Australian English vowels, Australian Journal of Linguistics, 1994, 14 (1): 93–107, doi:10.1080/07268609408599503
Iivonen, Antti; Harnud, Huhe. Acoustical comparison of the monophthong systems in Finnish, Mongolian and Udmurt. Journal of the International Phonetic Association. 2005, 35 (1): 59–71. doi:10.1017/S002510030500191X.
Jassem, Wiktor, Polish, Journal of the International Phonetic Association, 2003, 33 (1): 103–107, doi:10.1017/S0025100303001191
Jones, Daniel; Dennis, Ward. The Phonetics of Russian. Cambridge University Press. 1969. ISBN 0-521-06736-7.
Merrill, Elizabeth. Tilquiapan Zapotec. Journal of the International Phonetic Association. 2008, 38 (1): 107–114. doi:10.1017/S0025100308003344.
Roca, Iggy; Johnson, Wyn. A Course in Phonology. Blackwell Publishing. 1999. ISBN 0-631-21345-7.
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