[21] Studie The economic potential of cross-border pay-to-view and listen audiovisual media services, TNS opinion, Plum, The Futures Company, im Auftrag der Europäischen Kommission, Januar 2012, [http ...]
[21] The economic potential of cross-border pay-to-view audiovisual media services TNS opinion, Plum, the futures company (Studie over het economisch potentieel van grensoverschrijdende audiovisuele mediabetaaldiensten) - Studie in opdracht van de Europese Commissie – januari 2012 [http ...]
