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[6] Free&Fair Post, Is competition developing in the postal market? Comparison study of the French, German, Dutch and Belgian postal legislations, 2009.
[7] ITA Consulting GmbH& WIK-Consult GmbH, The Evolution of the European Postal Market since 1997, Study for the European Commission, DG Internal Market and Services, August 2009.
[8] KPMG, Estudo sobre o consumo empresarial de serviços postaishttps://www.anacom.pt/render.jsp?contentId=596055, Maio de 2008 para a ANACOM.
[9] The Boston consulting, Projecting US Mail volumes to 2020, Março de 2010.
[10] Richard Hooper CBE, Saving the Royal Mail's universal postal service in the digital age, Presented to Parliament by the Secretary of State for Business, Innovation and Skills By Command of Her Majesty, Setembro 2010.
[11] WIK-Consult, Main developments in the postal sector (2004-2006)https://www.anacom.pt/render.jsp?contentId=504210, Maio de 2006.
[12] WIK-Consult, The Role of Regulators in a More Competitive Postal Markethttp://ec.europa.eu/internal_market/post/doc/studies/2009-wik_regulators.pdf, September 2009.
