E-Government: Towards Electronic Democracy International Conference, TCGOV 2005, Bolzano, Italy, March 2-4, 2005, Proceedings Böhlen, Michael Heftet / 2005 / Engelsk
Spatio-Temporal Database Management International Workshop STDBM'99 Edinburgh, Scotland, September 10-11, 1999 Proceedings Böhlen, Michael H. Heftet / 1999 / Engelsk