Dr. Gerontidis Ioannis Dr. GerontidisIoannis Statistics Professor Emeritus igeront@mst.duth.gr 0030-2510-462326  CV Address:Democritus University of Thrace,Department of Management Science & Technology,Agios Loukas, 65404, KavalaPhone: 0030-2510-462326e-mail: igeront@mst.duth.gr