Bruce, R., Kessides, I. N., & Kneifel, L. (1999). Overcoming obstacles to liberalization of the telecom sector in estonia, poland, the czech republikc, Slovenia, and Hangary: An overview of key policy concerns and potential initiatives to facilitate the transition process. Washington, D.C.: World Bank.

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

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