Voiced bilabial fricative (English Wikipedia)

Martínez-Celdrán, Fernández-Planas & Carrera-Sabaté (2003:257) Martínez-Celdrán, Eugenio; Fernández-Planas, Ana María; Carrera-Sabaté, Josefina (2003), "Castilian Spanish", Journal of the International Phonetic Association, 33 (2): 255–259, doi:10.1017/S0025100303001373

antoninurubattu.it

(Italian) http://www.antoninurubattu.it/rubattu/grammatica-sarda-italiano-sardo.html Archived 2015-01-01 at the Wayback Machine

archive.org

Okada (1999:118) Okada, Hideo (1999), "Japanese", in International Phonetic Association (ed.), Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet, Cambridge University Press, pp. 117–119, ISBN 978-0-52163751-0

books.google.com

Hualde (1991:99–100) Hualde, José Ignacio (1991), Basque phonology, New York: Routledge, ISBN 978-0-415-05655-7
Phonetic studies such as Quilis (1981) have found that Spanish voiced stops may surface as spirants with various degrees of constriction. These allophones are not limited to regular fricative articulations, but range from articulations that involve a near complete oral closure to articulations involving a degree of aperture quite close to vocalization Quilis, Antonio (1981), Fonética acústica de la lengua española, Gredos, ISBN 9788424901325

doi.org

Ball, Martin J.; Howard, Sara J.; Miller, Kirk (2018). "Revisions to the extIPA chart". Journal of the International Phonetic Association. 48 (2): 155–164. doi:10.1017/S0025100317000147. S2CID 151863976.
Fulk, R.D. (2018). A Comparative Grammar of the Early Germanic Languages. Studies in Germanic Linguistics. Vol. 3. Amsterdam: Benjamins. p. 102. doi:10.1075/sigl.3. ISBN 978 90 272 6312 4.
Picard (1987:364), citing Pope (1966:92) Picard, Marc (1987), "On the Palatalization and Fricativization of W", International Journal of American Linguistics, 53 (3): 362–365, doi:10.1086/466063, S2CID 144308172 Pope, Mildred (1966), From Latin to Modern French, Manchester: Manchester University Press
Cruz-Ferreira (1995:92) Cruz-Ferreira, Madalena (1995), "European Portuguese", Journal of the International Phonetic Association, 25 (2): 90–94, doi:10.1017/S0025100300005223, S2CID 249414876
Madiba, M; Nkomo, D (2010-12-13). "The Tshivenda–English Thalusamaipfi/Dictionary as a Product of South African Lexicographic Processes". Lexikos. 20 (1). doi:10.4314/lex.v20i1.62719. hdl:11427/8892. ISSN 1684-4904.
Merrill (2008:109) Merrill, Elizabeth (2008), "Tilquiapan Zapotec", Journal of the International Phonetic Association, 38 (1): 107–114, doi:10.1017/S0025100308003344
Hayward & Hayward (1999:48) Hayward, Katrina; Hayward, Richard J. (1999), "Amharic", Handbook of the International Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press, pp. 45–50, doi:10.1017/S0025100300004874, ISBN 0-521-65236-7, S2CID 249404451
Maekawa (2020). Maekawa, Kikuo (2020), "Remarks on Japanese /w/", ICU Working Papers in Linguistics, 10: 45–52, doi:10.34577/00004625
Gussenhoven & Aarts (1999:155) 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
Peters (2006:117) Peters, Jörg (2006), "The dialect of Hasselt", Journal of the International Phonetic Association, 36 (1): 117–124, doi:10.1017/S0025100306002428
Martínez-Celdrán, Fernández-Planas & Carrera-Sabaté (2003:257) Martínez-Celdrán, Eugenio; Fernández-Planas, Ana María; Carrera-Sabaté, Josefina (2003), "Castilian Spanish", Journal of the International Phonetic Association, 33 (2): 255–259, doi:10.1017/S0025100303001373

dx.doi.org

Madiba, M; Nkomo, D (2010-12-13). "The Tshivenda–English Thalusamaipfi/Dictionary as a Product of South African Lexicographic Processes". Lexikos. 20 (1). doi:10.4314/lex.v20i1.62719. hdl:11427/8892. ISSN 1684-4904.

escholarship.org

Joyce Thambole Mogatse Mathangwane (1996). Phonetics and Phonology of Ikalanga: A Diachronic and Synchronic Study (PhD thesis). Berkeley: University of California. p. 79.
Maddieson et al. (1993:34) Maddieson, Ian; Spajić, Siniša; Sands, Bonny; Ladefoged, Peter (1993), "Phonetic structures of Dahalo", in Maddieson, Ian (ed.), UCLA working papers in phonetics: Fieldwork studies of targeted languages, vol. 84, Los Angeles: The UCLA Phonetics Laboratory Group, pp. 25–65

handle.net

hdl.handle.net

Madiba, M; Nkomo, D (2010-12-13). "The Tshivenda–English Thalusamaipfi/Dictionary as a Product of South African Lexicographic Processes". Lexikos. 20 (1). doi:10.4314/lex.v20i1.62719. hdl:11427/8892. ISSN 1684-4904.

iranicaonline.org

"PERSIAN LANGUAGE i. Early New Persian". Iranica Online. Retrieved 18 March 2019.

jbe-platform.com

Fulk, R.D. (2018). A Comparative Grammar of the Early Germanic Languages. Studies in Germanic Linguistics. Vol. 3. Amsterdam: Benjamins. p. 102. doi:10.1075/sigl.3. ISBN 978 90 272 6312 4.

oeaw.ac.at

kfs.oeaw.ac.at

Sylvia Moosmüller (2007). "Vowels in Standard Austrian German: An Acoustic-Phonetic and Phonological Analysis" (PDF). p. 6. Retrieved March 9, 2013.. This source mentions only intervocalic [β].

ruhosting.nl

gep.ruhosting.nl

Gussenhoven & Aarts (1999:155) 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

semanticscholar.org

api.semanticscholar.org

Ball, Martin J.; Howard, Sara J.; Miller, Kirk (2018). "Revisions to the extIPA chart". Journal of the International Phonetic Association. 48 (2): 155–164. doi:10.1017/S0025100317000147. S2CID 151863976.
Picard (1987:364), citing Pope (1966:92) Picard, Marc (1987), "On the Palatalization and Fricativization of W", International Journal of American Linguistics, 53 (3): 362–365, doi:10.1086/466063, S2CID 144308172 Pope, Mildred (1966), From Latin to Modern French, Manchester: Manchester University Press
Cruz-Ferreira (1995:92) Cruz-Ferreira, Madalena (1995), "European Portuguese", Journal of the International Phonetic Association, 25 (2): 90–94, doi:10.1017/S0025100300005223, S2CID 249414876
Hayward & Hayward (1999:48) Hayward, Katrina; Hayward, Richard J. (1999), "Amharic", Handbook of the International Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press, pp. 45–50, doi:10.1017/S0025100300004874, ISBN 0-521-65236-7, S2CID 249404451
Gussenhoven & Aarts (1999:155) 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

sil.org

www-01.sil.org

Mose Lung Rambok; Hooley, Bruce (2010). Central Buang‒English Dictionary (PDF). Summer Institute of Linguistics Papua New Guinea Branch. ISBN 978-9980-0-3589-9. Archived from the original (PDF) on 2017-11-10.

web.archive.org

Mose Lung Rambok; Hooley, Bruce (2010). Central Buang‒English Dictionary (PDF). Summer Institute of Linguistics Papua New Guinea Branch. ISBN 978-9980-0-3589-9. Archived from the original (PDF) on 2017-11-10.
(Italian) http://www.antoninurubattu.it/rubattu/grammatica-sarda-italiano-sardo.html Archived 2015-01-01 at the Wayback Machine

worldcat.org

Madiba, M; Nkomo, D (2010-12-13). "The Tshivenda–English Thalusamaipfi/Dictionary as a Product of South African Lexicographic Processes". Lexikos. 20 (1). doi:10.4314/lex.v20i1.62719. hdl:11427/8892. ISSN 1684-4904.