Bruce, R. R. 1., Kessides, I. N., & Kneifel, L. (1999). Overcoming obstacles to liberalization of the telecom sector in Estonia, Poland, the Czech Republic, Slovenia, and Hungary: An overview of key policy concerns and potential initiatives to facilitate the transition process. Washington, D.C.: The World Bank.

Bruce, Robert R. 1944-, Ioannis Nicolaos Kessides, and Lothar Kneifel. Overcoming Obstacles to Liberalization of the Telecom Sector in Estonia, Poland, the Czech Republic, Slovenia, and Hungary: An Overview of Key Policy Concerns and Potential Initiatives to Facilitate the Transition Process. Washington, D.C.: The World Bank, 1999.

Bruce, Robert R. 1944-, Ioannis Nicolaos Kessides, and Lothar Kneifel. Overcoming Obstacles to Liberalization of the Telecom Sector in Estonia, Poland, the Czech Republic, Slovenia, and Hungary: An Overview of Key Policy Concerns and Potential Initiatives to Facilitate the Transition Process. Washington, D.C.: The World Bank, 1999.