@inproceedings{TUW-107187, author = {Schmidt, Thomas and Wippel, Gerald and Glanzer, Klaus and F{\"u}rst, Karl}, title = {Security Systems for Enterprise-spanning Collaboration}, booktitle = {Proceedings of the International Conference on Web Services}, year = {2003}, pages = {299--305}, isbn = {1-892512-49-1}, note = {talk: International Conference on Web Services, Las Vegas, USA; 2003-06-23 -- 2003-06-26} }