1. Loader J (1970) Basic laser Raman spectroscopy. Heyden, London, chap 4
2. Craig NC, Levin IW (1979) Appl. Spectrosc. 33: 475
3. Striganov AR, Sventitskii NS (1968) Tables of spectral lines of neutral and ionised atoms. IFI/ Plenum Data Corp., New York
4. Savoie R, Pigeon-Gosselin M (1983) Can. J. Spectrosc. 28: 133
5. Chemical Rubber Company Handbook of Chemistry and Physics (1987) 68th edn, Weast RC (ed) CRC, Boca Raton, FL, pp E201-E327