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@techreport{DFSB99, author = {G Dermler and George Fankhauser and Burkhard Stiller and Torsten Braun and D Billard}, title = {Approaches for the Integration of Charging and Accounting into Internet Models and VPN}, institution = {ETH Zuerich. Deliverable CATI-IBM-DN-P-004-1.0}, month = {Jul}, year = {1999} }