Bibliografi Vokal bundar belakang separuh sempit

  • Carbonell, Joan F.; Llisterri, Joaquim (1992), "Catalan", Journal of the International Phonetic Association, 22 (1-2): 53–56 
  • Cruz-Ferreira, Madalena (1995), "European Portuguese", Journal of the International Phonetic Association, 25 (2): 90–94 
  • Fougeron, Cecile; Smith, Caroline L (1993), "Illustrations of the IPA:French", Journal of the International Phonetic Association, 23 (2): 73–76 
  • Jones, Daniel; Dennis, Ward (1969). The Phonetics of Russian. Cambridge University Press. 
  • Martínez-Celdrán, Eugenio; Fernández-Planas, Ana Ma.; Carrera-Sabaté, Josefina (2003), "Castilian Spanish", Journal of the International Phonetic Association, 33 (2): 255–259 
  • Merrill, Elizabeth (2008), "Tilquipan Zapotec", Journal of the International Phonetic Association, 38 (1): 107–114 
  • Roach, Peter (2004), "British English: Received Pronunciation", Journal of the International Phonetic Association, 34 (2): 239–245 
  • Roca, Iggy; Johnson, Wyn (1999). A Course in Phonology. Blackwell Publishing. 
  • Rogers, Derek; d'Arcangeli, Luciana (2004), "Italian", Journal of the International Phonetic Association, 34 (1): 117–121