Iraj Mahdavi, Nezam Mahdavi-Amiri, Armaghan Heidarzade and Rahele Nourifar
Applied Mathematics and Computation 206 ( 2 ): 607 - 617 , 2008
Iraj Mahdavi, Hamed Fazlollahtabar, Mohammad Mahdi Paydar and Armaghan Heidarzade
Journal of Applied Sciences 8 ( 17 ): 2983 - 2990 , 2008