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Journal of Applied Sciences 7 ( 1 ): 115 - 120 , 2007
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Journal of Applied Sciences 6 ( 5 ): 993 - 997 , 2006
Ani Shabri and Abdul Aziz Jemain
Journal of Mathematics and Statistics 2 ( 3 ): 414 - 421 , 2006
Ani Shabri and Abdul Aziz Jemain
Journal of Mathematics and Statistics 5 ( 4 ): 298 - 304 , 2009