Open front rounded vowel (English Wikipedia)

Jones (1956:15), Wells (1975:52) Jones, Daniel (1956). Cardinal Vowels Spoken by Daniel Jones: Text of Records with Explanatory Notes by Professor Jones (PDF). London: Linguaphone Institute. p. 15: This cardinal sound is not known to occur in any language. Wells, J. C. (1975), "The Association's Alphabet", Journal of the International Phonetic Association, 5 (2): 52–58, doi:10.1017/S0025100300001274, JSTOR 44525810, p. 52: Although it may seldom or never be needed for phonemic transcription, I feel that for completeness' sake, and to fill an awkward gap in our vowel chart, we should recognize this symbol for an open front rounded vowel.
Heijmans & Gussenhoven (1998:110) Heijmans, Linda; Gussenhoven, Carlos (1998), "The Dutch dialect of Weert" (PDF), Journal of the International Phonetic Association, 28 (1–2): 107–112, doi:10.1017/S0025100300006307, S2CID 145635698, archived from the original (PDF) on 2016-03-04, retrieved 2015-10-25
Gussenhoven & Aarts (1999:159, 161–162, 164) Gussenhoven, Carlos; Aarts, Flor (1999), "The dialect of Maastricht" (PDF), Journal of the International Phonetic Association, 29 (2), University of Nijmegen, Centre for Language Studies: 155–166, doi:10.1017/S0025100300006526, S2CID 145782045, archived from the original (PDF) on 2017-10-11, retrieved 2022-02-18
Grønnum (1998:100) Grønnum, Nina (1998), "Danish", Journal of the International Phonetic Association, 28 (1–2): 99–105, doi:10.1017/S0025100300006290, S2CID 249412109

jstor.org (Global: 26^th place; English: 20^th place)

Jones (1956:15), Wells (1975:52) Jones, Daniel (1956). Cardinal Vowels Spoken by Daniel Jones: Text of Records with Explanatory Notes by Professor Jones (PDF). London: Linguaphone Institute. p. 15: This cardinal sound is not known to occur in any language. Wells, J. C. (1975), "The Association's Alphabet", Journal of the International Phonetic Association, 5 (2): 52–58, doi:10.1017/S0025100300001274, JSTOR 44525810, p. 52: Although it may seldom or never be needed for phonemic transcription, I feel that for completeness' sake, and to fill an awkward gap in our vowel chart, we should recognize this symbol for an open front rounded vowel.

Heijmans & Gussenhoven (1998:110) Heijmans, Linda; Gussenhoven, Carlos (1998), "The Dutch dialect of Weert" (PDF), Journal of the International Phonetic Association, 28 (1–2): 107–112, doi:10.1017/S0025100300006307, S2CID 145635698, archived from the original (PDF) on 2016-03-04, retrieved 2015-10-25
Gussenhoven & Aarts (1999:159, 161–162, 164) Gussenhoven, Carlos; Aarts, Flor (1999), "The dialect of Maastricht" (PDF), Journal of the International Phonetic Association, 29 (2), University of Nijmegen, Centre for Language Studies: 155–166, doi:10.1017/S0025100300006526, S2CID 145782045, archived from the original (PDF) on 2017-10-11, retrieved 2022-02-18

Jones (1956:15), Wells (1975:52) Jones, Daniel (1956). Cardinal Vowels Spoken by Daniel Jones: Text of Records with Explanatory Notes by Professor Jones (PDF). London: Linguaphone Institute. p. 15: This cardinal sound is not known to occur in any language. Wells, J. C. (1975), "The Association's Alphabet", Journal of the International Phonetic Association, 5 (2): 52–58, doi:10.1017/S0025100300001274, JSTOR 44525810, p. 52: Although it may seldom or never be needed for phonemic transcription, I feel that for completeness' sake, and to fill an awkward gap in our vowel chart, we should recognize this symbol for an open front rounded vowel.

Heijmans & Gussenhoven (1998:110) Heijmans, Linda; Gussenhoven, Carlos (1998), "The Dutch dialect of Weert" (PDF), Journal of the International Phonetic Association, 28 (1–2): 107–112, doi:10.1017/S0025100300006307, S2CID 145635698, archived from the original (PDF) on 2016-03-04, retrieved 2015-10-25
Gussenhoven & Aarts (1999:159, 161–162, 164) Gussenhoven, Carlos; Aarts, Flor (1999), "The dialect of Maastricht" (PDF), Journal of the International Phonetic Association, 29 (2), University of Nijmegen, Centre for Language Studies: 155–166, doi:10.1017/S0025100300006526, S2CID 145782045, archived from the original (PDF) on 2017-10-11, retrieved 2022-02-18
Grønnum (1998:100) Grønnum, Nina (1998), "Danish", Journal of the International Phonetic Association, 28 (1–2): 99–105, doi:10.1017/S0025100300006290, S2CID 249412109

Heijmans & Gussenhoven (1998:110) Heijmans, Linda; Gussenhoven, Carlos (1998), "The Dutch dialect of Weert" (PDF), Journal of the International Phonetic Association, 28 (1–2): 107–112, doi:10.1017/S0025100300006307, S2CID 145635698, archived from the original (PDF) on 2016-03-04, retrieved 2015-10-25
Gussenhoven & Aarts (1999:159, 161–162, 164) Gussenhoven, Carlos; Aarts, Flor (1999), "The dialect of Maastricht" (PDF), Journal of the International Phonetic Association, 29 (2), University of Nijmegen, Centre for Language Studies: 155–166, doi:10.1017/S0025100300006526, S2CID 145782045, archived from the original (PDF) on 2017-10-11, retrieved 2022-02-18