Xiaofeng Meng Haiyan Wang Dongdong Hu Mingzhe Gu SG-WRAM Schema Guided Wrapper Maintenance. 750-752 http://csdl.computer.org/comp/proceedings/icde/2003/2071/00/20710750abs.htm 2003 conf/icde/2003 ICDE db/conf/icde/icde2003.html#MengWHG03