1. ISO/IEC 2382-1:1993 Information technology — Vocabulary — Part 1: Fundamental terms (32 pp.), Switzerland, Geneva.
2. ISO/IEC 2382-28:1995 Information technology - Vocabulary – Part 28: Artificial intelligence – Basic concepts and expert Systems (25 pp.), Switzerland, Geneva.
3. Standardization of representation knowledge in IT, technology, informatics and education for learning and knowledge society;Micić,2011