1. The world factbook,2011
2. Bhutan’s experience in capacity building in the RE sector;Tshering,2006
3. Distributed renewable energy systems for rural village electrification;Gyeltshen,2006
4. Integrated master plan study for the Dzongkhag-wise electrification in Bhutan,2005
5. Recent studies on solar and wind resources in Bhutan by the national renewable energy laboratory (NREL),2009