“Operating conditions of batteries in off-grid renewable energy systems”, Solar Energy, vol. 81, pp. 1409–1425, 2007.
“Application of design standards to the design of offshore wind turbines in the US”, Offshore Technology Conference, 2006.
“Detailed Evaluation of Renewable Energy Power System Operation: A Summary of the European Union Hybrid Power System Component Benchmarking Project; Preprint”. National Renewable Energy Laboratory (NREL), Golden, CO., 2005.
“Which battery is best? Selecting the technically most suitable and economically best battery for a renewable energy system–approach, results, outlook”, Proceedings of the Australian and New Zealand Solar Society, Solar, vol. 30, 2004.
“Understanding wind energy for water pumping”, in VITA Understanding technology series, vol. 62, VITA, 1988.