Science Citation Index Expanded This link opens in a new windowThis multidisciplinary resource indexes journal literature of the sciences. Represented disciplines include astronomy, biochemistry, biology, chemistry, computer science, engineering, genetics, geology, materials science, mathematics, medicine, neuroscience, oncology, pediatrics, pharmacology, physics, psychiatry, veterinary science, and zoology. Search by topic, keyword, or author. Identify articles that cited a previous work. Links to full-text occur when available. Also known as SCI.