1. Some notes on the phonology of the Nzema and Ahanta dialects;Berry;Bulletin of the School of Oriental and African Studies,1955
2. Vowel harmony in Twi;Berry;Bulletin of the School of Oriental and African Studies,1957
3. Dictionary of the Asante and Fante called Tshi (Twi);Chris taller,1881
4. Akan vowel harmony: a nonlinear analysis;Clements;Harvard Journal of Phonology,1981
5. The Akan (Twi-Fante) language: its sound systems and tonal structure;Dolphyne,1988