1. Budai, B. B. (2009). Az e-közigazgatás elmélete. Akadémiai Kiadó.
2. Complex Discovery. (2020, December 15). Complex discovery. Source. https://complexdiscovery.com/the-digital-services-acttransformational-digital-regulation-from-the-european-commission/
3. European Commission. (1994). Europe’s way to the information society. An action plan—Communication from the Commission to the Council and the European Parliament and to the Economic and Social Commitee and the Committee of Regions’. Brussels: COM_1994_0347_FIN.
4. European Commission. (2000). eEurope 2002, An information society for all, action plan.
5. European Commission. (2010). Communication from the commission to the European Parliament, the European Council, the Council, the European Economic and Social Committee and the Committee of the Regions.