1. Environmental Informatics
2. Environmental Information Systems
3. Hicks D. Tochtermann K. Rose T.&Eich S.(1999).Using metadata to support customization in digital libraries Proceedings of the Third IEEE Meta‐Data Conference Maryland USA http://computer.org/conferen/proceed/meta/1999/papers/19/dhicks.html.
4. GEIN (2000).German Environmental Information Network http://www.gein.de.
5. Environmental Software Systems