1. Department of Statistics, Faculty of Mathematics and Statistics, University of Isfahan, Isfahan 81746-73441, Iran
2. Department of Statistics, Faculty of Science, Fasa University, Fasa, Fars, Iran
3. Faculty of Civil Engineering, Technische Universität Dresden, 01069 Dresden, Germany
4. John von Neumann Faculty of Informatics, Obuda University, 1034 Budapest, Hungary
5. Institute of Information Society, University of Public Service, 1083 Budapest, Hungary
6. Institute of Information Engineering, Automation and Mathematics, Slovak University of Technology in Bratislava, Bratislava, Slovakia