1. Mathematical Institute of the Serbian Academy of Sciences Knez Mihailova 36/III Beograd 11000 Serbia
2. Department of Medical Research, China Medical University HospitalChina Medical University Taichung 40402 Taiwan Republic of China
3. Department of Computer Science and Information EngineeringAsia University 500 Lioufeng Rd., Wufeng Taichung 41354 Taiwan Republic of China
4. Faculty of Science, Department of Mathematics‐Computer SciencesNecmettin Erbakan University Konya Turkey