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

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

Bruce, Robert R., et al. Overcoming Obstacles to Liberalization of the Telecom Sector in Estonia, Poland, the Czech Republic, Slovenia, and Hungary: An Overwiew of Key Policy Concerns and Potential Initiatives to Facilitate the Transition Process. World Bank, 1999.