1. Department of Mathematical Sciences, Islamic University of Science and Technology, Kashmir 192122, India
2. Department of Mathematics, School of Science, King Mongkut’s Institute of Technology Ladkrabang, Bangkok 10520, Thailand
3. Departamento De Ciencias Exatas E Engenharia, Academia Militar, Av. Conde Castro Guimaraes, 2720-113 Amadora, Portugal