1. Analysys (2007). The business case for sub-loop unbundling in the Netherlands. Final Report for OPTA (public version), Ref. 264–483, 26 January 〈http://opta.nl/download/Analysys+Final+Report%2Epdf〉.
2. Bergman, M. A. (2004). Competition in services or infrastructure-based competition? Report commissioned by the Swedish National Post and Telecom Agency, September 16.
3. Bijlsma, M., & van Dijk, M. (2007). Nieuwe generatie netwerken, nieuwe generatie regulering?. CPB Document 145, Den Haag: CPB Netherlands Bureau for Economic Policy Analysis.
4. Processes and institutions: New perspectives on policymaking and regulatory authorities;Booth,2006
5. Market-based alternatives or complements to regulation;Cave,2006