Home › Authors › Vassilis Hatzopoulos 👤 Vassilis Hatzopoulos 3 books Books by Vassilis Hatzopoulos Collaborative Economy and EU L Collaborative Economy and EU Law 2018 Regulating services in the Eur Regulating services in the European Union 2012 Le principe communautaire d'éq Le principe communautaire d'équivalence et de reconnaissance mutuelle dans la libre prestation de services 1999