Ian T. Foster Jens-S. Vöckler Michael Wilde Yong Zhao Chimera: AVirtual Data System for Representing, Querying, and Automating Data Derivation. 37-46 2002 conf/ssdbm/2002 SSDBM http://doi.ieeecomputersociety.org/10.1109/SSDM.2002.1029704 db/conf/ssdbm/ssdbm2002.html#FosterVWZ02