1. Design and cost optimisation of utility-grade off-grid power systems;Berdner,1997
2. Byrne, J., Shen, B., Wallace, W., Li, X., 1997, Levelized cost analysis of small-scale, off-grid photovoltaic, wind and PV-wind hybrid systems for inner Mangolia, China. Report submitted to the National Renewable Energy Laboratory, Prepared by the Centre for Energy and Environmental Policy, University of Delaware.
3. China Electric Power, 1996. Electricity comes from wind. Vol. 503, No.2, Beijing.
4. Cowley, P., Crick, F., Fraenkel, P., 1999. Commercialisation of the IT power small windpump. Proceedings of 1999 European Wind Energy Conference, p. 915.
5. Garrad, A., 1995. Future Prospects for wind energy. The Wworld Directory of Renewable Energy Supplies and Services, James X James (Science Publishers) Ltd, London, p. 178.