1. Department of Mathematics, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran
2. Department of Mathematics, University of Management and Technology, Lahore, Pakistan
3. Department of Engineering Science, Bandırma Onyedi Eylül University, Bandırma 10200, Balıkesir, Turkey
4. Institute of Research and Development of Processes, Campus of Leioa (Bizkaia), University of the Basque Country, Barrio Sarriena, P.O. Box 644-Bilbao, 48940 Leioa, Spain