Psycharis Γ. European Regional Science Association Congresses (ERSA/RSAI) for the Period 2010-2012. 50th ERSA Congress 2010, Jönköping Sweden. 51st ERSA Congress 2011, Barcelona Spain. 52nd ERSA Congress 2012, Bratislava Slovakia. ΑΕΙΧΩΡΟΣ 2011, 182-185.