1. Agrell, P. J. (1998). “Efficiency Measurement and Benchmarking of Nordic Electricity Distributors.” Pre-prints of the Nordic Specialists’ Meeting , Stockholm
2. Agrell, P. J. and P. Bogetoft. (2002). Ekonomisk Nätbesiktning. Report, Swedish Energy Agency. (In Swedish)
3. Incentive plans for productive efficiency, innovation and learning