1. AAT 1995. The AAT Editorial Manual: Related terms. User Friendly, 2(3-4), 6–15. Getty Art History Information Program.
2. AAT 2000. http://shiva.pub.getty.edu/aat_browser .
3. Aitchison J., Gilchrist A. 1987. Thesaurus construction: a practical manual. ASLIB: London.
4. Alani H., Jones C., Tudhope D. in press. Voronoi-based region approximation for geographical information retrieval with online gazetteers. Internat. Journal of Geographic Information Systems.
5. Lect Notes Comput Sci;B. Amann,1999