European Commission : Directorate-General for Economic and Financial Affairs., Koszerek, D., Havik, K., McMorrow, K., Roger, W., & Schonborn, F. (2007). An overview of the EU KLEMS growth and productivity accounts. Brussels- Belgium: European Comission: Directorate-General for Economic and Financial Affairs.

European Commission : Directorate-General for Economic and Financial Affairs., Douglas Koszerek, Karel Havik, Kieran McMorrow, Werner Roger, and Frank Schonborn. An Overview of the EU KLEMS Growth and Productivity Accounts. Brussels- Belgium: European Comission: Directorate-General for Economic and Financial Affairs, 2007.

European Commission : Directorate-General for Economic and Financial Affairs., et al. An Overview of the EU KLEMS Growth and Productivity Accounts. Brussels- Belgium: European Comission: Directorate-General for Economic and Financial Affairs, 2007.