Copyright [©] (1999) by Association for Computing Machinery, Inc. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distrubuted for profit or commericial advantage. To copy otherwise, to republish, to post on servers, or to redistribute to lists, requires prior specific permission and/or a fee.
By: Charu C. Aggarwal, Joel L. Wolf, Philip S. Yu
Published in: SIGMOD Record, volume 28, (no 2), pages 61-72 in 1999
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