1. R. G. Gordon Jr. th 2005 http://www.ethnologue.com/
2. XNLRDF, the open source framework for multilingual computing;Streiter,2005
3. The word;Martinet;Diogenes,1965
4. International Standard ISO/IEC 9126. Information technology - Software product evaluation -- Quality Characteristics and Guidelines for their Use 1991
5. TEMAA: A testbed study of evaluation methodologies: Authoring aids;Thompson,1994