Asian Journal of Information Technology 4 ( 9 ): 888 - 889 , 2005
Asian Journal of Information Technology 6 ( 8 ): 870 - 872 , 2007
Asian Journal of Information Technology 7 ( 4 ): 130 - 132 , 2008
Journal of Mobile Communication 2 ( 1 ): 27 - 29 , 2008