Roach (2004), p. 242. Roach, Peter (2004), "British English: Received Pronunciation", Journal of the International Phonetic Association, 34 (2): 239–245, doi:10.1017/S0025100304001768
Cox, Driedger & Tucker (2013), p. 224. Cox, Cristopher; Driedger, Jacob M.; Tucker, Benjamin V. (2013), "Mennonite Plautdietsch (Canadian Old Colony)", Journal of the International Phonetic Association, 43 (2): 221–229, doi:10.1017/S0025100313000121
Collins & Mees (2003:128, 131). The source describes the Standard Dutch vowel as front-central [ɵ̟], but more sources (e.g. van Heuven & Genet (2002) and Verhoeven (2005)) describe it as central [ɵ]. As far as the lowered varieties of this vowel are concerned, Collins and Mees do not describe their exact backness. Collins, Beverley; Mees, Inger M. (2003) [First published 1981], The Phonetics of English and Dutch (5th ed.), Leiden: Brill Publishers, ISBN9004103406 van Heuven, Vincent J.; Genet, Roos (2002). Wat is het beste IPA-symbool voor de u van put?. Dag van de Fonetiek. Utrecht. A summary of the presentation can be found here. Verhoeven, Jo (2005), "Belgian Standard Dutch", Journal of the International Phonetic Association, 35 (2): 245, doi:10.1017/S0025100305002173
Cox, Driedger & Tucker (2013), pp. 224–225. Cox, Cristopher; Driedger, Jacob M.; Tucker, Benjamin V. (2013), "Mennonite Plautdietsch (Canadian Old Colony)", Journal of the International Phonetic Association, 43 (2): 221–229, doi:10.1017/S0025100313000121
Collins & Mees (2003:128, 131). The source describes the Standard Dutch vowel as front-central [ɵ̟], but more sources (e.g. van Heuven & Genet (2002) and Verhoeven (2005)) describe it as central [ɵ]. As far as the lowered varieties of this vowel are concerned, Collins and Mees do not describe their exact backness. Collins, Beverley; Mees, Inger M. (2003) [First published 1981], The Phonetics of English and Dutch (5th ed.), Leiden: Brill Publishers, ISBN9004103406 van Heuven, Vincent J.; Genet, Roos (2002). Wat is het beste IPA-symbool voor de u van put?. Dag van de Fonetiek. Utrecht. A summary of the presentation can be found here. Verhoeven, Jo (2005), "Belgian Standard Dutch", Journal of the International Phonetic Association, 35 (2): 245, doi:10.1017/S0025100305002173
