1. Department of Electrical and Electronic Engineering Educators, School of Pedagogical and Technological Education (ASPETE), 14121 N. Heraklio, Athens, Greece
2. Department of Engineering Mathematics, Faculty of Engineering, Cairo University, Orman, Giza 12221, Egypt
3. Department of Mathematics and Theoretical Informatics, Faculty of Electrical Engineering and Informatics, Technical University of Košice, B. Němcovej 32, 042 00, Košice, Slovakia
4. School of Control Science and Engineering, Shandong University, Jinan, Shandong 250061, China
5. Department of Mathematics, Faculty of Arts and Sciences, Gaziosmanpasa University, 60240 Tokat, Turkey