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Bar-Yossef, Ziv; Jayram, T. S.; Kumar, Ravi; Sivakumar, D.; Trevisan, Luca (2002-09-13). "Counting Distinct Elements in a Data Stream". Randomization and Approximation Techniques in Computer Science. Lecture Notes in Computer Science. Vol. 2483. Springer, Berlin, Heidelberg. pp. 1–10. CiteSeerX10.1.1.12.6276. doi:10.1007/3-540-45726-7_1. ISBN978-3540457268. S2CID4684185.
Bar-Yossef, Ziv; Jayram, T. S.; Kumar, Ravi; Sivakumar, D.; Trevisan, Luca (2002-09-13). Rolim, José D. P.; Vadhan, Salil (eds.). Counting Distinct Elements in a Data Stream. Lecture Notes in Computer Science. Springer Berlin Heidelberg. pp. 1–10. CiteSeerX10.1.1.12.6276. doi:10.1007/3-540-45726-7_1. ISBN978-3-540-44147-2. S2CID4684185.
Babcock, Brian; Babu, Shivnath; Datar, Mayur; Motwani, Rajeev; Widom, Jennifer (2002). "Models and issues in data stream systems". Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems. PODS '02. New York, NY, USA: ACM. pp. 1–16. CiteSeerX10.1.1.138.190. doi:10.1145/543613.543615. ISBN978-1581135077. S2CID2071130.
Bar-Yossef, Ziv; Jayram, T. S.; Kumar, Ravi; Sivakumar, D.; Trevisan, Luca (2002-09-13). "Counting Distinct Elements in a Data Stream". Randomization and Approximation Techniques in Computer Science. Lecture Notes in Computer Science. Vol. 2483. Springer, Berlin, Heidelberg. pp. 1–10. CiteSeerX10.1.1.12.6276. doi:10.1007/3-540-45726-7_1. ISBN978-3540457268. S2CID4684185.
Indyk, Piotr; Woodruff, David (2005-01-01). "Optimal approximations of the frequency moments of data streams". Proceedings of the thirty-seventh annual ACM symposium on Theory of computing. STOC '05. New York, NY, USA: ACM. pp. 202–208. doi:10.1145/1060590.1060621. ISBN978-1-58113-960-0. S2CID7911758.
Bar-Yossef, Ziv; Jayram, T. S.; Kumar, Ravi; Sivakumar, D.; Trevisan, Luca (2002-09-13). Rolim, José D. P.; Vadhan, Salil (eds.). Counting Distinct Elements in a Data Stream. Lecture Notes in Computer Science. Springer Berlin Heidelberg. pp. 1–10. CiteSeerX10.1.1.12.6276. doi:10.1007/3-540-45726-7_1. ISBN978-3-540-44147-2. S2CID4684185.