Petroleum Coke: Industry and Environmental Issues, Congressional Research Service
Petroleum Coke Overview, American Fuel and Petrochemical Manufacturers
Petroleum Coke Fact Sheet, American Fuel and Petrochemical Manufacturers
Petroleum Coke: Essential to Manufacturing, National Association of Manufacturers
Petroleum Coke 2007, Environmental Protection Agency
Petroleum Coke 2011, Environmental Protection Agency
Toxicity Assessment, Michigan Department of Environmental Quality