Its manner of articulation is sibilantfricative, which means it is generally produced by channeling air flow along a groove in the back of the tongue up to the place of articulation, at which point it is focused against the sharp edge of the nearly clenched teeth, causing high-frequency turbulence.
Somewhat obsolete in many words, in which most speakers realize it as hard [ʐː].[13] Present only in a few words, usually written ⟨жж⟩ or ⟨зж⟩. See Russian phonology
Boretzky, Nobert; Igla, Birgit (1994), Wörterbuch Romani-Deutsch-Englisch für den südosteuropäischen Raum : mit einer Grammatik der Dialektvarianten, Wiesbaden: Harrassowitz Verlag, ISBN3-447-03459-9
Chirkova, Katia; Chen, Yiya; Kocjančič Antolík, Tanja (2013), "Xumi, Part 2: Upper Xumi, the Variety of the Upper Reaches of the Shuiluo River", Journal of the International Phonetic Association, 43 (3): 381–396, doi:10.1017/S0025100313000169
Huber, Magnus (2004), "Ghanaian English: phonology", in Schneider, Edgar W.; Burridge, Kate; Kortmann, Bernd; Mesthrie, Rajend; Upton, Clive (eds.), A handbook of varieties of English, vol. 1: Phonology, Mouton de Gruyter, pp. 842–865, ISBN3-11-017532-0
Jassem, Wiktor (2003), "Polish", Journal of the International Phonetic Association, 33 (1): 103–107, doi:10.1017/S0025100303001191
Landau, Ernestina; Lončarić, Mijo; Horga, Damir; Škarić, Ivo (1999), "Croatian", Handbook of the International Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press, pp. 66–69, ISBN0-521-65236-7
Mateus, Maria Helena; d'Andrade, Ernesto (2000), The Phonology of Portuguese, Oxford University Press, ISBN0-19-823581-X
Yanushevskaya, Irena; Bunčić, Daniel (2015), "Russian", Journal of the International Phonetic Association, 45 (2): 221–228, doi:10.1017/S0025100314000395