Muhammad Younas Elhadi Shakshuki Kuo-Ming Chao Special issue: Web and mobile information systems. 131-132 2008 74 J. Comput. Syst. Sci. 2 http://dx.doi.org/10.1016/j.jcss.2007.04.005 db/journals/jcss/jcss74.html#YounasSC08