Since we want to work correctly, here is the mandatory IEEE copyright notice:
"©2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE."
And don't forget, for any publications which report results of this paper, the following citation should be used: Herbert Schlangemann, “Towards the Simulation of E-Commerce”, in Proc. of International Conference on Computer Science and Software Engineering (CSSE), Wuhan, China, 2008
have fun :-)