Cremer, Helmuth, Roy, Bernard, Toledano, Joëlle and de Villemeur, Étienne (2004) Access and (Non-)Uniform Pricing in the Postal Sector. In: Competitive Transformation of the Postal and Delivery Sector Crew, Michael A. and Kleindorfer, Paul R. (eds.) Springer. Series “Topics in Regulatory Economics and Policy”, Vol. 46. Chapter 2. pp. 43-68. ISBN 978-1-4419-8915-4

Cremer, Helmuth, De Donder, Philippe and Rodriguez, Frank (2004) Access Pricing and the Uniform Tariff in the Postal Sector. In: Competitive Transformation of the Postal and Delivery Sector Crew, Michael A. and Kleindorfer, Paul R. (eds.) Springer. Series “Topics in Regulatory Economics and Policy”, Vol. 46. Chapter 3. pp. 69-86. ISBN 978-1-4419-8915-4