1. Available from http://www.eurocris.org/—Annex information for Seminar on CRIS Strategy, Brussels, Belgium, 18–19 September 2003.
2. Infrared and optical masers;Schawlow;Phys. Rev.,1958
3. Available from http://www.bell-labs.com/history/laser/invention/invention9.html.
4. Available from http://www.pbs.org/wgbh/aso/databank/entries/bocric.html.
5. Patent number BE804332 pub 28 February 1974 (eq. US3894179 pub 08 July 1975; Derwent Primary Accession Number: 1974-A0045V) assigned to Philips Gloeilampenfab with priority filing in the Netherlands on 2 September 1972.