Energy Citations Database"The Energy Citations Database (ECD) provides free access to over 2,498,000 science research citations with continued growth through regular updates. There are over 315,000 full-text documents, primarily from 1943 forward, available via the database. Citations and documents are made publicly available by the U.S. Department of Energy (DOE). ECD includes scientific and technical research results in disciplines of interest to DOE such as chemistry, physics, materials, environmental science, geology, engineering, mathematics, climatology, oceanography, and computer science. It includes bibliographic citations to report literature, conference papers, journal articles, books, dissertations, and patents."