1. Nasalization in Hindi: a reconsideration;Bhatia;Papers in Linguistics,1972
2. An Experimental Study of Nasality with Particular Reference to Brazilian Portuguese;Cagliari,1977
3. Studies in Gujarati Phonology and Phonetics;Dave,1977
4. Explaining the chronology of nasal vowels by acoustic and radiographic analysis;Delattre,1969
5. Acoustic Theory of Speech Production;Fant,1960