1. Department of Mathematics, School of Science, University of Phayao, Mae Ka, Phayao 56000, Thailand
2. Department of Economics and Economic History, University of Salamanca, Salamanca, Spain
3. Department of Mathematics, University of the Punjab, Lahore 54590, Pakistan
4. Algebra and Applications Research Unit, Division of Computational Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90110, Thailand