清齒齦塞擦音Somfai, Kyrgyz, Lincom Europa, 2003, ISBN 3895868434 Kordić, Snježana, Serbo-Croatian, Languages of the World/Materials; 148, Munich & Newcastle: Lincom Europa
中後圓唇元音2010 [2018-04-08], （原始内容 (PDF)存档于2018-11-01） Árnason, Kristján, The Phonology of Icelandic and Faroese, Oxford University Press, 2011, ISBN 978-0-19-922931-4
濁齒齦擦音Slavic and East European Languages: 42–54, 1958 Kordić, Snježana, Serbo-Croatian, Languages of the World/Materials; 148, Munich & Newcastle: Lincom Europa
齒齦鼻音（英语）. 洪建新. 教学生发前、后鼻音两法. 《小学语文教师》 2014年12期. Firchow, Jackie. Organised Phonology Data (PDF). 1992 [2019-07-09]. （原始内容存档 (PDF)于2018-07-09）. Bates, Dawn;
清齒齦擦音East European Languages: 42–54, 1958, JSTOR 304696 Kordić, Snježana, Serbo-Croatian, Languages of the World/Materials; 148, Munich & Newcastle: Lincom Europa