Abraham Silberschatz, Michael Stonebraker, Jeffrey D. Ullman Database Systems: Achievements and Opportunities - The "Lagunita" Report of the NSF Invitational Workshop on the Future of Database System Research held in Palo Alto, California, February 22-23, 1990. [Citation Graph (14, 0)][DBLP] SIGMOD Record, 1990, v:19, n:4, pp:6-22 [Journal]