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Asian Journal of Information Technology 3 ( 12 ): 1271 - 1275 , 2004
Asian Journal of Information Technology 5 ( 12 ): 1319 - 1322 , 2006
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Asian Journal of Information Technology 6 ( 9 ): 952 - 955 , 2007
Asian Journal of Information Technology 7 ( 8 ): 313 - 315 , 2008