Journal of Engineering and Applied Sciences 4 ( 1 ): 68 - 73 , 2009
Journal of Engineering and Applied Sciences 4 ( 3 ): 221 - 231 , 2009
Journal of Engineering and Applied Sciences 6 ( 6 ): 336 - 345 , 2011
Research Journal of Applied Sciences 4 ( 5 ): 166 - 177 , 2009