1. Mathematical Institute of the Serbian Academy of Sciences, Beograd, Serbia + Department of Medical Research, China Medical University Hospital, China + Medical University, Taichung, Taiwan, Republic of China + Department of Computer Science and Informatio
2. Faculty of Electrical Engineering, Belgrade University, Beograd, Serbia
3. Deptartment of Mathematical Sciences, Appalachian State University Boone, USA
4. Brno University of Technology, CEITEC BUT, Brno, Czech Republic