1. BIPM Comptes Rendus de la 10e CGPM (1954) 1956 80.
2. BIPM Comptes Rendus de la 13eCGPM (1967/68) 1969 104.
3. CIE Photometry ‐ The CIE System of Physical Photometry ISO 23539:2005(E)/CIE S 010/E:2004 2004.
4. CIE The Basis of Physical Photometry 3rd Edition CIE 018:2019 to be published.
5. BIPM Comptes Rendus de la 16eCGPM (1979) 1980 100.