Bibliografi Vokal_bundar_pusat_separuh_sempit

  • Cox, F.M. (2006), "The acoustic characteristics of /hVd/ vowels in the speech of some Australian teenagers", Australian Journal of Linguistics, 26: 147–179  pautan luar dalam |title= (bantuan)
  • Durie, M.; Hajek, J. (1994), "A revised standard phonemic orthography for Australian English vowels", Australian Journal of Linguistics, 14: 93–107 
  • Iivonen, Antti; Harnud, Huhe (2005), "Acoustical comparison of the monophthong systems in Finnish, Mongolian and Udmurt", Journal of the International Phonetic Association, 35 (1): 59–71