"Net Metering Rules"(PDF). Arkansas Public Service Commission. September 2013. Archived from the original(PDF) on November 7, 2014. Retrieved June 1, 2014.
ar.gov
geology.ar.gov
"Crude Oil". Arkansas Geological Survey. Archived from the original on February 3, 2014. Retrieved June 15, 2014.
"Net Metering Rules"(PDF). Arkansas Public Service Commission. September 2013. Archived from the original(PDF) on November 7, 2014. Retrieved June 1, 2014.