Hartmut H. Holzmüller Jan Schlüchter Delphi study about the future of B2B marketplaces in Germany. 2-19 2002 1 Electronic Commerce Research and Applications 1 http://dx.doi.org/10.1016/S1567-4223(02)00003-0 db/journals/ecra/ecra1.html#HolzmullerS02