1. Achebe, I., Ikekeonwu, C., Eme, C., Emenanjo, N., Wanjiku, N.: A Composite Synchronic Alphabet of Igbo Dialects (CSAID). IADP, New York (2011)
2. Cocks, J., Keegan, T.: A word-based approach for diacritic restoration in Māori. In: 2011 Proceedings of the Australasian Language Technology Association Workshop, Canberra, Australia, pp. 126–130, December 2011
3. Crandall, D.: Automatic Accent Restoration in Spanish Text (2016). http://www.cs.indiana.edu/~djcran/projects/674_final.pdf . Accessed 7 Jan 2016
4. De Pauw, G., De Schryver, G.M., Pretorius, L., Levin, L.: Introduction to the special issue on African language technology. Lang. Resour. Eval. 45, 263–269 (2011). Springer Online
5. Lecture Notes in Computer Science;RF Mihalcea,2002