Korea Gas Corporation (Kogas): Importer and distributor of natural gas, supplying power generation plants, gas utility companies, and city gas companies. [Korean/English]
Korea Petroleum Information Network: Covers petrochemical and energy industry, also publishes statistics.
SK Corporation: Oil refining and marketing firm; also makes aviation fuel and lubricants.
SK Global Energy Sales Group: Sells petroleum products including gasoline, diesel, kerosene LPG, and various by-products such as lubricants and asphalt, as well as fuel and service vessels at sea.
US Energy Information Administration Country Analysis Brief: Report on energy sector, including information on oil, gas, coal, and electricity.