[Wikipedia article on bzip2] Wikipedia article on bzip2.
[bzip2 home page] bzip2 home page.
[Apache Commons Compress site] Apache Commons Compress.
[Wikipedia article on gzip] Wikipedia article on gzip.
[Wikipedia article on LZMA] Wikipedia article on LZMA.
[LZMA SDK] LZMA SDK home page.
[Wikipedia article on Tar] Wikipedia article on Tar.
[Gnu Tar manual] Gnu Tar manual.
[PKWARE Zip application note] PKWARE Zip application note.
[Info-Zip's Zip application note] Info-Zip's Zip application note.
[Wikipedia article on Zip] Wikipedia article on Zip.
[At4J test report] At4J test report.