Voiceless retroflex affricate (English Wikipedia)

Academia de la Llingua Asturiana (2005). Normes ortográfiques (PDF) (in Asturian) (6th revised ed.). Academia Llingua Asturiana. p. 14. ISBN 84-8168-394-9. Archived from the original (PDF) on 2013-03-23.

archive.org (Global: 6^th place; English: 6^th place)

Ladefoged & Wu (1984:?) Ladefoged, Peter; Wu, Zongji (1984), "Places of Articulation: An Investigation of Pekingese Fricatives and Affricates", Journal of Phonetics, 11 (3): 267–278, doi:10.1016/S0095-4470(19)30883-6
Jassem (2003:103) Jassem, Wiktor (2003), "Polish", Journal of the International Phonetic Association, 33 (1): 103–107, doi:10.1017/S0025100303001191
Hamann (2004:65) Hamann, Silke (2004), "Retroflex fricatives in Slavic languages" (PDF), Journal of the International Phonetic Association, 34 (1): 53–67, doi:10.1017/S0025100304001604, S2CID 2224095, archived from the original (PDF) on 2015-04-14, retrieved 2015-04-09
Hanulíková & Hamann (2010), p. 374. Hanulíková, Adriana; Hamann, Silke (2010), "Slovak" (PDF), Journal of the International Phonetic Association, 40 (3): 373–378, doi:10.1017/S0025100310000162

Lunsford (2001), pp. 16–20. Lunsford, Wayne A. (2001). An overview of linguistic structures in Torwali, a language of Northern Pakistan (PDF) (M.A. thesis). Arlington: University of Texas. Archived from the original (PDF) on 2007-06-12.

Lee, Wai-Sum (1999). An articulatory and acoustical analysis of the syllable-initial sibilants and approximant in Beijing Mandarin (PDF). Proceedings of the 14th International Congress of Phonetic Sciences. pp. 413–416. S2CID 51828449.
Hamann (2004:65) Hamann, Silke (2004), "Retroflex fricatives in Slavic languages" (PDF), Journal of the International Phonetic Association, 34 (1): 53–67, doi:10.1017/S0025100304001604, S2CID 2224095, archived from the original (PDF) on 2015-04-14, retrieved 2015-04-09

Hamann (2004:65) Hamann, Silke (2004), "Retroflex fricatives in Slavic languages" (PDF), Journal of the International Phonetic Association, 34 (1): 53–67, doi:10.1017/S0025100304001604, S2CID 2224095, archived from the original (PDF) on 2015-04-14, retrieved 2015-04-09
Hanulíková & Hamann (2010), p. 374. Hanulíková, Adriana; Hamann, Silke (2010), "Slovak" (PDF), Journal of the International Phonetic Association, 40 (3): 373–378, doi:10.1017/S0025100310000162

"Gwary polskie - Gwara regionu". Gwarypolskie.uw.edu.pl. Archived from the original on 2013-11-13. Retrieved 2013-11-13.
"Gwary polskie - Szadzenie". Gwarypolskie.uw.edu.pl. Archived from the original on 2013-11-13. Retrieved 2013-11-13.

Academia de la Llingua Asturiana (2005). Normes ortográfiques (PDF) (in Asturian) (6th revised ed.). Academia Llingua Asturiana. p. 14. ISBN 84-8168-394-9. Archived from the original (PDF) on 2013-03-23.
Hamann (2004:65) Hamann, Silke (2004), "Retroflex fricatives in Slavic languages" (PDF), Journal of the International Phonetic Association, 34 (1): 53–67, doi:10.1017/S0025100304001604, S2CID 2224095, archived from the original (PDF) on 2015-04-14, retrieved 2015-04-09
"Gwary polskie - Gwara regionu". Gwarypolskie.uw.edu.pl. Archived from the original on 2013-11-13. Retrieved 2013-11-13.
"Gwary polskie - Szadzenie". Gwarypolskie.uw.edu.pl. Archived from the original on 2013-11-13. Retrieved 2013-11-13.
Lunsford (2001), pp. 16–20. Lunsford, Wayne A. (2001). An overview of linguistic structures in Torwali, a language of Northern Pakistan (PDF) (M.A. thesis). Arlington: University of Texas. Archived from the original (PDF) on 2007-06-12.