Hua-Gang Li Songting Chen Jun'ichi Tatemura Divyakant Agrawal K. Selçuk Candan Wang-Pin Hsiung Safety Guarantee of Continuous Join Queries over Punctuated Data Streams. 19-30 2006 conf/vldb/2006 VLDB http://www.vldb.org/conf/2006/p19-li.pdf db/conf/vldb/vldb2006.html#LiCTACH06