Dr. Goumas Stefanos Dr. Goumas Stefanos Associate Professor goumas@mst.ihu.gr 0030-2510-462318  CV Address:International Hellenic University,Department of Management Science & TechnologyAgios Loukas, 65404, KavalaPhone: 0030-2510-462318Fax: 0030-2510-462318e-mail: goumas@mst.ihu.gr