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@inproceedings{KZDS00, author = {Helmut Kneer and Urs Zurfluh and G Dermler and Burkhard Stiller}, title = {A Business Model for Charging and Accounting of Internet Services}, address = {Greenwich, U.K.}, pages = {429--441}, publisher = {International Conference on Electronic Commerce and Web Technologies, Leture Notes on Computer Science}, volume = {1875}, month = {Sep}, year = {2000} }