^ Бондарко Л. В. Гласные // Лингвистический энциклопедический словарь / Главный редактор В. Н. Ярцева. — М.: Советская энциклопедия, 1990. — 685 с. — ISBN 5-85270-031-2. (俄文)
Beddor, P. S. 1983. Phonological and phonetic effects of nasalization on vowel height
Juliette Blevins (2004). Evolutionary Phonology: The Emergence of Sound Patterns. Cambridge University Press. p. 203.
John Hajek, chapitre 10 [archive] « Vowel Nasalization » dans Martin Haspelmath (dir.), Matthew S. Dryer (dir.), David Gil (dir.) and Bernard Comrie (dir.), The World Atlas of Language Structures Online, Munich, Max Planck Digital Library, 2011 (ISBN 978-3-9813099-1-1)
延伸閱讀
de Medeiros, Beatriz Raposo. (2011). Nasal Coda and Vowel Nasality in Brazilian Portuguese. In S. M. Alvord (Ed.), Selected Proceedings of the 5th Conference on Laboratory Approaches to Romance Phonology (pp. 33-45).
Hajek, John & Maeda, Shinji. (2000). Investigating Universals of Sound Change: the Effect of Vowel Height and Duration on the Development of Distinctive Nasalization. Papers in Laboratory Phonology V: Acquisition and the lexicon (pp. 52-69).
Jeong, Sunwoo. (2012). Directional asymmetry in nasalization: Aperceptual account. Studies in Phonetics, Phonology and Morphology, 18(3), 437-469.
Michaud, A., Jacques, G., & Rankin, R. L. (2012). Historical transfer of nasality between consonantal onset and vowel: from C to V or from V to C? Diachronica, 29(2), 201-230.
Sampson, Rodney. (1999). Nasal Vowel Evolution in Romance. Oxford University Press.