Slovakia（Prešov）Rusyn alphabet、莱姆科（波兰）卢森尼亚字母 Lemko（Poland）Rusyn alphabet、潘诺尼亚卢森尼亚字母（Pannonian Rusyn alphabet）、白俄罗斯语字母（Belarusian alphabet）、保加利亚语字母（Bulgarian alphabet）、马其顿语字母（Macedonian

次開央不圓唇元音

Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press: 70–74, 1999, ISBN 0-521-65236-7

濁齒齦擦音

Phonetic Association: A Guide to the usage of the International Phonetic Alphabet., Cambridge: Cambridge University Press: 140–142, 1999, ISBN 978-0-521-63751-0

中後不圓唇元音

ISBN 978-0-8264-8873-2, （原始内容存档于2019-06-08） Ternes, Elmer; Vladimirova-Buhtz, Tatjana, Bulgarian, Handbook of the International Phonetic Association, Cambridge University

半開前不圓唇元音

Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press: 70–74, 1999, ISBN 0-521-65236-7

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次開央不圓唇元音

Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press: 70–74, 1999, ISBN 0-521-65236-7

濁齒齦擦音

Phonetic Association: A Guide to the usage of the International Phonetic Alphabet., Cambridge: Cambridge University Press: 140–142, 1999, ISBN 978-0-521-63751-0

中後不圓唇元音

ISBN 978-0-8264-8873-2, （原始内容存档于2019-06-08） Ternes, Elmer; Vladimirova-Buhtz, Tatjana, Bulgarian, Handbook of the International Phonetic Association, Cambridge University

半開前不圓唇元音

Phonetic Association: A guide to the use of the International Phonetic Alphabet, Cambridge: Cambridge University Press: 70–74, 1999, ISBN 0-521-65236-7