1. Characterization and modelling of test units using salt hydrates;Achard,1981
2. Transmission systems for offshore wind farms;Ackermann;Renewable Energy World,2002
3. Proc. 14th Intersociety Energy Conversion Engineering Conf.;Adolfson,1979
4. Institute of Electrical and Electronics Engineers;André;Transactions PAS-95,1976
5. Den nya energin,1980