Phd, IAE Aix-en-Provence, FR
PhD, Paris-Dauphine University, FR
PhD, Faculty of Economics and Management of Sfax, TN
PhD , Estonian Business School, Estonia and Finland.
Postdoc, Oulu University, Finland.
PhD, Grenoble-Alpes University, FR
PhD, Wageningen University and Reasearch , NL
PhD, Aix-Marseille University - IAE Aix en Provence, FR
PhD, "channel system"
Memorial University of Newfoundland in Canada - Assiut University in Egypt