Efficiently Discovering Recent Frequent Items in Data Streams. - Ferry Irawan Tantono; Nishad Manerikar; Themis Palpanas (SSDBM, 2008)

Frequent items in streaming data: An experimental evaluation of the state-of-the-art. - Nishad Manerikar; Themis Palpanas (Data Knowl. Eng., 2009)