[2] Federal Information Processing Standards Publication: computer graphics metafile (CGM) - fipspub128-1987.pdf, , https://nvlpubs.nist.gov/nistpubs/Legacy/FIPS/fipspub128-1987.pdf
[3] Microsoft Word - a032378e.doc - c032378e.pdf, , http://www.urbanjost.altervista.org/LIBRARY/libvogle/drivers/doc/CGM/doc/c032378e.pdf
[4] 関連記事: ISO/IEC 10036, DOCS