1. Madiega T, Polona C, Niestadt M. The very well designed description of key aspects of the problems of metaverse was presented in: Metaverse. Opportunities, risks and policy implications. In: With Louise Van de Pol, EPRS, PE 733.557, June 2022. Brussels, Belgium: European Parliamentary Research Service (EPRS); 2022
2. It is important to make a distinction between the strict regulations and the “soft law” related to the Code of Conducts, various types of self-regulations. In: Regulating disinformation with AI, European Parliamentary Research Service, Brussels, 2019; based on the report by Marsden C, University of Sussex and Mayer T, Vrije Universiteit Brussel; 2019
3. Madiega T, Van De Pol AL. Concept of the regulatory sandboxes, proposed. In: AI Act, Regulation of the European Parliament and the Council. Laying down harmonised rules on Artificial Intelligence (Artificial Intelligence Act) and amending certain Union legislative acts (COM)2021 206 final/2021/0106/COD, and described briefly: Artificial Intelligence Act and regulatory sandboxes, PE 733.544 – June 2022. Brussels, Belgium: European Parliamentary Research Service (EPRS); 2022. p. 2022
4. Negreiro M, Niestadt M. EU Digital Identity Wallet, Proposal for a Regulation of the European Parliament and of the Council amending Regulation (EU) No 910/2014 as regards stabilising a framework for a European Digital Identity, COM/2021/ 281 final, and the description. Brussels: The European Digital Identity Framework; 2022
5. Moynihan H, Buchner M, Wallace J. What is the metaverse? Chatham House: The Royal Institute of International Affairs; 2022. Available from: