* Zhong-Ren Peng, Ming-Hsiang Tsou. Internet GIS: Distributed Geographic Information Services for the Internet and Wireless Networks. John Wiley & Sons, 31. 3. 2003 - Počet stran: 679.
* Directive 2007/2/EC of the European Parliament and of the Council of 14 March 2007 establishing an Infrastructure for Spatial Information in the European Community (INSPIRE).