Jie Yang Guoqing Wu Luis Zhu A New Navigation Method for Web Users. 147-150 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3032&spage=147 2003 conf/gcc/2003-1 GCC (1) db/conf/gcc/gcc2003-1.html#YangWZ03