中前不圆唇元音
参考资料

↑  Jarrah, Mohamed Ali Saleh (1993) harv error: no target: CITEREFJarrah,_Mohamed_Ali_Saleh1993 (help)
↑  Traunmüller (1982) harv error: no target: CITEREFTraunmüller1982 (help), cited in Ladefoged & Maddieson (1996:290頁) harv error: no target: CITEREFLadefogedMaddieson1996 (help)
1 2  Recasens (1996:59-60頁) harv error: no target: CITEREFRecasens1996 (help)
1 2  Dankovičová (1999:72頁) harv error: no target: CITEREFDankovičová1999 (help)
↑  Uldall (1933) harv error: no target: CITEREFUldall1933 (help), cited in Ladefoged & Maddieson (1996:289頁) harv error: no target: CITEREFLadefogedMaddieson1996 (help)
↑  Ladefoged & Johnson (2010:227頁) harv error: no target: CITEREFLadefogedJohnson2010 (help)
↑  Grønnum (1998:100頁) harv error: no target: CITEREFGrønnum1998 (help)
↑  Grønnum (2005:268頁) harv error: no target: CITEREFGrønnum2005 (help)
↑  Grønnum (2003) harv error: no target: CITEREFGrønnum2003 (help)
↑  Basbøll (2005:45頁) harv error: no target: CITEREFBasbøll2005 (help)
↑  . 5 November 2010  [11 March 2015]. （原始内容存档于2020-11-02）.
↑  Allan, Holmes & Lundskær-Nielsen (2000:17頁) harv error: no target: CITEREFAllanHolmesLundskær-Nielsen2000 (help)
↑  Peters (2010:241頁) harv error: no target: CITEREFPeters2010 (help)
↑  Coupland (1990:95頁)
↑  Roach (2004:242頁) harv error: no target: CITEREFRoach2004 (help)
1 2  Labov, William; Ash, Sharon; Boberg, Charles. . Department of Linguistics, University of Pennsylvania. 15 July 1997  [March 7, 2013]. （原始内容存档于2005-12-23）.
1 2  Scobbie, Gordeeva & Matthews (2006:7頁)
↑  Roca & Johnson (1999:179頁)
↑  Asu & Teras (2009:368頁) harv error: no target: CITEREFAsuTeras2009 (help)
↑  Iivonen & Harnud (2005:60, 66頁)
↑  Suomi, Toivanen & Ylitalo (2008:21頁) harv error: no target: CITEREFSuomiToivanenYlitalo2008 (help)
↑  Marti (1985)，第?頁. sfnp error: no target: CITEREFMarti1985 (help)
1 2  Kohler (1999:87頁) harv error: no target: CITEREFKohler1999 (help)
↑  Mangold (2005:37頁) harv error: no target: CITEREFMangold2005 (help)
↑  Laufer (1999:98頁)
↑  Szende (1994:92頁)
↑  Urua (2004:106頁) harv error: no target: CITEREFUrua2004 (help)
↑  Okada (1991:94頁)
1 2  Valenzuela & Gussenhoven (2013:101頁) harv error: no target: CITEREFValenzuelaGussenhoven2013 (help)
↑  Lee (1999:121頁)
↑  Gussenhoven & Aarts (1999:159頁) harv error: no target: CITEREFGussenhovenAarts1999 (help)
↑  Heijmans & Gussenhoven (1998:107頁) harv error: no target: CITEREFHeijmansGussenhoven1998 (help)
↑  Vanvik (1979:13頁)
↑  和其他国际变体的/ɛ/或/ɨ/与/i/(巴西方言[i ~ ɪ ~ e̞])对应。低化至[ɛ̝ ~ ɛ]可能出现在amazofonia, nordestino, mineiro (米纳斯吉拉斯州)和fluminense (RJ)如果没有鼻化([ẽ̞]不和/ẽ/相对应)，也可能高化并和/e/合流，这出现在苏利斯塔, 圣保罗州和sertanejo。
1 2  Stichting Kirchröadsjer Dieksiejoneer (1997:16頁) harv error: no target: CITEREFStichting_Kirchröadsjer_Dieksiejoneer1997 (help)
↑  Jones & Ward (1969:41頁)
↑  Landau et al. (1999:67頁)
↑  Hanulíková & Hamann (2010:375頁) harv error: no target: CITEREFHanulíkováHamann2010 (help)
↑  Kráľ (1988:92頁) harv error: no target: CITEREFKráľ1988 (help)
1 2  Pavlík (2004:93, 95頁) harv error: no target: CITEREFPavlík2004 (help)
1 2  Tatjana Srebot-Rejec.  (PDF).   [2016-01-17]. （原始内容存档 (PDF)于2019-08-04）.
↑  Šuštaršič, Komar & Petek (1999:138頁) harv error: no target: CITEREFŠuštaršičKomarPetek1999 (help)
↑  Martínez-Celdrán, Fernández-Planas & Carrera-Sabaté (2003:256頁)
↑  Engstrand (1999:140頁)
↑  Tench (2007:230頁) harv error: no target: CITEREFTench2007 (help)
↑  Zimmer & Orgun (1999:155頁)
↑  Göksel & Kerslake (2005:10頁) harv error: no target: CITEREFGökselKerslake2005 (help)
1 2  Šewc-Schuster (1984:34頁) harv error: no target: CITEREFŠewc-Schuster1984 (help)
↑  Sipma (1913:10頁) harv error: no target: CITEREFSipma1913 (help)
↑  Tiersma (1999:10頁) harv error: no target: CITEREFTiersma1999 (help)
1 2  Bamgboṣe (1969:166頁) harv error: no target: CITEREFBamgboṣe1969 (help)