1. Bigun, J.: Vision with Direction: A Systematic Introduction to Image Processing and Vision. Springer, Heidelberg (2006)
2. Bunke, H., Sanfeliu, A.: Syntactic and Structural Pattern Recognition: Theory and Applications. World Scientific, Singapore (1990)
3. Cowell, J., Hussain, F.: Amharic character recognition using a fast signature based algorithm. In: Proc. Fourth Int’l. Conf. Information Visualization, pp. 384–389 (2003)
4. Lecture Notes in Computer Science;W. Forstner,1994
5. Gerard, A.S.: African Language Literatures: An introduction to the literary history of sub-Saharan Africa. Three Continents Press, Washington (1981)