Ke Yi Hai Yu Jun Yang Gangqiang Xia Yuguo Chen Efficient Maintenance of Materialized Top-k Views. 189-200 http://csdl.computer.org/comp/proceedings/icde/2003/2071/00/20710189abs.htm 2003 conf/icde/2003 ICDE db/conf/icde/icde2003.html#YiYYXC03