1. DC Power Production, Delivery and Utilization;George,2006
2. The Galvin Path to Perfect Power – A Technical Assessment;Galvin Electricity Initiative,2007
3. Catalog of DC Appliances and Power Systems;Garbesi,2011
4. Renewable Systems Interconnection Study: Advanced Grid Planning and Operations;McGranaghan,2008
5. Barriers and Industry Recommendations for Commercial Buildings;Zero Energy Commercial Buildings Consortium (CBC),2011