@inproceedings{PreussSyrbeKoenig2016, author = {Thomas Preuss and Jens-Hagen Syrbe and Hartmut K{\"o}nig}, title = {Permanent Customer-Provider Relationships for Electronic Service Markets}, booktitle = {Kommunikation in Verteilten Systemen (KiVS) : 11. ITG/GI-Fachtagung. Darmstadt, 2.-5. M{\"a}rz 1999}, pages = {326 -- 337}, year = {2016}, }