Professor of Mathematics, Faculty of Science and Arts, University of Sütçü İmam

Professor of Mathematics, Nisantasi University

Huazhong University of Science and Technology

Laboratory of Advanced Materials, Badji Mokhtar-Annaba University, Algeria

Saratov State University

University of Sciences and Technology of Oran (USTOMB)

Hanoi University of Science, Vietnam National University

Lecturer, Faculty of Science, Mansoura University

Institut für Mathematik, Universität Paderborn, Germany