Media type: E-Article Title: Over 20 Years of Reaction Access Systems from MDL: A Novel Reaction Substructure Search Algorithm Contributor: Chen, Lingran; Nourse, James G.; Christie, Bradley D.; Leland, Burton A.; Grier, David L. imprint: American Chemical Society (ACS), 2002 Published in: Journal of Chemical Information and Computer Sciences Language: English DOI: 10.1021/ci020023s ISSN: 0095-2338 Keywords: Computational Theory and Mathematics ; Computer Science Applications ; Information Systems ; General Chemistry Origination: Footnote: