### 44.18 References and Further Reading

The authoritative sources for physical constants are the 2006 CODATA recommended values, published in the article below. Further information on the values of physical constants is also available from the NIST website.

- P.J. Mohr, B.N. Taylor, D.B. Newell, “CODATA Recommended Values of the Fundamental Physical Constants: 2006”, Reviews of Modern Physics, 80(2), pp. 633–730 (2008).
- http://www.physics.nist.gov/cuu/Constants/index.html
- http://physics.nist.gov/Pubs/SP811/appenB9.html