1. Faculty of Basic Science, Babol University of Technology, P.O. Box 47148-71167, Babol, Iran
2. Department of Mathematics, Cankaya University, Ogretmenler Caddesi 14, Balgat, 06530 Ankara, Turkey
3. Institute of Space Sciences, P.O. Box MG 23, Magurele, 077125 Bucharest, Romania
4. Department of Chemical and Materials Engineering, Faculty of Engineering, King Abdulaziz University, P.O. Box 80204, Jeddah 21589, Saudi Arabia