Units パッケージは IEEE/ASTM SI 10-1997 Standard [1] and NIST Special Publication 811, 1995 Edition Guide [5] を International System of Units (SI) を使うための基礎としています。パッケージは次の違い以外は IEEE 標準にしたがっています。

[1] Standard for Use of the International System of Units (SI): The Modern Metric System, IEEE/ASTM SI 10-1997.

[2] Milton Abramowitz and Irene A. Stegun, Handbook of Mathematical Functions, Dover, 1972, pp. 6-8.

[3] Francois Cardarelli, Scientific Unit Conversion, 2nd Edition, Springer-Verlag, 1999.

[4] David R. Lide, Handbook of Chemistry and Physics, CRC, 1995-1996, pp.1-1 - 1-6, 1-20 - 1-43.

[5] Barry Taylor, Guide for the Use of the International system of Units (SI), NIST Special Publication 811 1995 Edition.

[5] The Internation System of Units (SI), Bureau International des Poids et Measures, 7th edition, 1998.