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"fixity check". PREMIS 2.0 Preservation Events Collection. Library of Congress Standards & Research Data Values Registry. https://www.loc.gov/standards/premis/pif-presentations/rebecca-SKOS/preservationEvents-FixityCheck.html
Giaretta, David (2011). Advanced Digital Preservation. ISBN 9783642168086. 9783642168086
Novak, Audrey. "Fixity Checks: Checksums, Message Digests and Digital Signatures" (PDF). ILTS Digital Preservation Committee. http://www.library.yale.edu/iac/DPC/AN_DPC_FixityChecksFinal11.pdf
"Authenticity of Electronic Federal Government Publications" (PDF). U.S. Government Printing Office. https://www.gpo.gov/pdfs/authentication/authenticationwhitepaper2011.pdf
Bailey, Jefferson. "File Fixity and Digital Preservation Storage: More Results from the NDSA Storage Survey". The Signal: Digital Preservation Blog. The Library of Congress. http://blogs.loc.gov/digitalpreservation/2012/03/file-fixity-and-digital-preservation-storage-more-results-from-the-ndsa-storage-survey/