Hung-Yu Kao Shian-Hua Lin Jan-Ming Ho Ming-Syan Chen Mining Web Informative Structures and Contents Based on Entropy Analysis. 41-55 2004 16 IEEE Trans. Knowl. Data Eng. 1 http://csdl.computer.org/comp/trans/tk/2004/01/k0041abs.htm db/journals/tkde/tkde16.html#KaoLHC04