Persistent Object Systems: Design, Implementation, and Use 9th International Workshop, POS-9, Lillehammer, Norway, September 6-8, 2000, Revised Papers - Kirby, Graham N.C; Kirby, Graham N.C; Dearle, Alan; Dearle, Alan; Sjoberg, Dag I.K; Sjoberg, Dag I.K (Springer Berlin Heidelberg : Imprint: Springer, 2001)