1. Nonlinear Analysis Research Group, Ton Duc Thang University, Ho Chi Minh City, Vietnam + Faculty of Mathematics and Statistics, Ton Duc Thang University, Ho Chi Minh City, Vietnam
2. Faculty of Organizational Sciences, University of Belgrade, Belgrade, Serbia
3. Department of Mathematical Sciences, Faculty of Education, Thamar University, Thamar, Republic of Yemen
4. University in Priština - Kosovska Mitrovica, Teacher Education Faculty, Leposavić, Serbia
5. Faculty of Mechanical Enginering, University of Belgrade, Belgrade, Serbia