Trends in Distributed Systems: Towards a Universal Service Market Third International IFIP/GI Working Conference, USM 2000 Munich, Germany, September 12-14, 2000 Proceedings - Linnhoff-Popien, Claudia; Linnhoff-Popien, Claudia; Hegering, Heinz-Gerd; Hegering, Heinz-Gerd (Springer Berlin Heidelberg : Imprint: Springer, 2000)