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@inproceedings{SRHG01, author = {Burkhard Stiller and Peter Reichl and Hasan Hasan and Jan Gerke and Placi Flury}, title = {Open Interfaces and Databases of a Modular Internet Charge Calculation and Accounting System}, address = {San Antonio, Texas, U.S.A.}, publisher = {IEEE Globecom}, month = {Nov}, year = {2001} }