Norman W. Paton Andrew Dinn M. Howard Williams Active Rules in Database Systems Springer, New York 1999 69-80 db/books/collections/patton99.html#PattonDW99 journals/tods/AikenHW95 conf/rules/BaralisW95 books/mk/widomC96/CeriFPT96 conf/artdb/ColletM95 ... conf/bncod/DinnPWF96 conf/vldb/GehaniJS92 conf/vldb/RosenthalC88 conf/rules/ReddiPS95 conf/sigmod/StonebrakerJGP90