1. Renewable energy policy network for the 21st century (REN21), renewable global status 2005 Update, Paris; 2005.
2. Micro-hydro systems – a buyer’s guide,2004
3. Water energy resources of the United States with emphasis on low head/low power resources;United States, Department of Energy,2004
4. Feasibility assessment of the water energy resources of the United States for new low power and small hydro classes of hydroelectric plants;United States, Department of Energy,2006
5. Virtual hydropower prospecting, a foundation for water energy resource planning and development;Lee;J Map Geogr Libraries,2008