Chia-Hui Chang Harianto Siek Jiann-Jyh Lu Chun-Nan Hsu Jen-Jie Chiou Reconfigurable Web Wrapper Agents. 34-40 2003 18 IEEE Intelligent Systems 5 http://csdl.computer.org/comp/mags/ex/2003/05/x5034abs.htm db/journals/expert/expert18.html#ChangSLHC03