Abdallah S. Al-Zoubi and Elias Salameh
Journal of Applied Sciences 3 ( 4 ): 216 - 224 , 2003
Awni T. Batayneh, Abdallah S. Al-Zoubi and Mohammad M. Abu-Ajamieh
Journal of Applied Sciences 4 ( 1 ): 28 - 37 , 2004