[1] 2000 Mathematics Subject Classification
[2] Any2DjVu Server
[3] Sean M. Burke, Perl & LWP, 244 p., O'Reilly 2002
[4] Comité Consultatif International Téléphonique et Télégraphique Group 4 (CCITT G4) Protocol
[5] Digital Library Federation
[6] DjVuZone, The Technology for Scanned Documents on the Web
[7] Specification of DjVu Image Compression Format, Version of 1999/04/29.
[8] Dublin Core Metadata Initivative
[9] Gallica
[10] Mathematical Reviews (MR)
[11] Mathematics Metadata Markup Server
[12] LZW Data Compression by Mark Nelson Dr. Dobb's Journal October, 1989
[13] NUMDAM: Numérisation de documents anciens mathématiques
[14] Open Archive Initiative
[15] Portable Document Format (PDF)
[16] PNM Format
[17] Project Gutenberg
[18] SourceForge Net
[19] TIFF, Tagged Image File Format
[20] Zentralblatt für Mathematik (ZBL)
[21] ZIP, GZIP file format specification version 4.3, RFC 1952