@inproceedings{TUW-138998, author = {Tjoa, A Min and Brezany, Peter and W{\"o}hrer, Alexander and Janciak, Ivan}, title = {Virtualizing Heterogeneous Data Sources on the Grid - Design Concepts and Implementation}, booktitle = {Proceedings KGGI04}, year = {2004}, pages = {34--47}, publisher = {IEEE}, isbn = {0-9734039-8-5}, note = {Vortrag: int. WS on Kowledge Grid and Grid Intelligence 2004, Beijing, China; 2004-09-20} }