1. Department of Mathematics, School of Science, University of Management and Technology, Sialkot Campus, Lahore, Pakistan
2. Department of Mathematics, School of Science, University of Management and Technology, Lahore 54770, Pakistan
3. Department of Mathematics, School of Science, University of Phayao, Mae Ka, Mueang, Phayao 56000, Thailand
4. University of Criminal Investigation and Police Studies, Department of Forensics, Cara Dušana 196, 11080 Belgrade, Serbia
5. Environ, D.O.O, Čukarička 9, Belgrade, Serbia
6. City Secretary, City Administration of Belgrade, Secretariat for Public Transport, 43-45 27 Marta Street, 11000 Belgrade, Serbia