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Rajarshi Guha, Michael T. Howard, Geoffrey R. Hutchison, Peter Murray-Rust, Henry Rzepa, Christoph Steinbeck, Jörg Wegner, Egon L. Willighagen: The Blue Obelisk—Interoperability in Chemical Informatics. In: Journal of Chemical Information and Modeling. Band46, Nr.3, 2006, ISSN1549-9596, S.991–998, doi:10.1021/ci050400b, PMID 16711717.
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Rajarshi Guha, Michael T. Howard, Geoffrey R. Hutchison, Peter Murray-Rust, Henry Rzepa, Christoph Steinbeck, Jörg Wegner, Egon L. Willighagen: The Blue Obelisk—Interoperability in Chemical Informatics. In: Journal of Chemical Information and Modeling. Band46, Nr.3, 2006, ISSN1549-9596, S.991–998, doi:10.1021/ci050400b, PMID 16711717.