1. BIPM http://www.bipm.org/en/publications/si-brochure/kelvin.html
2. th http://www.bipm.org/utils/common/pdf/24_CGPM_Resolutions
3. Consultative Committee for Thermometry http://www.bipm.org/cc/CCT/Allowed/Summary_reports/RECOMMENDATION_web_version.pdf
4. Determination of the Boltzmann constant-status and prospects;Fellmuth;Meas. Sci. Technol.,2006