1. Preliminary lists of terms for the arc and spark spectra of tungsten
2. Moore C. E., Atomic Energy Levels, NBS cric.467, vol. III (1958).
3. Second spectrum of tungsten (W II)
4. M. I. Cabeza, L. Iglesias, and F. R. Rico, Opt. Pura Apl. 18, 1 (1985).
5. Wyart, J.-F, Opt. Pura Apl. 10, 177 (1977)